Fixes for cppcheck findings

* <error file="..\..\Sources\Application\BusmasterDump.cpp" line="20" id="unreadVariable" severity="style" msg="Variable 'hParent' is assigned a value that is never used."/>
* <error file="..\..\Sources\Application\BusmasterDump.cpp" line="51" id="unusedVariable" severity="style" msg="Unused variable: szScratch"/>
* <error file="..\..\Sources\Application\ChannelConfigurationDlg.cpp" line="174" id="variableScope" severity="style" msg="The scope of the variable 'chString' can be reduced."/>
* <error file="..\..\Sources\Application\ChannelConfigurationDlg.cpp" line="330" id="stlSize" severity="style" msg="Possible inefficient checking for 'ouClusterList' emptiness."/>
* <error file="..\..\Sources\Application\ChannelConfigurationDlg.cpp" line="342" id="postfixOperator" severity="style" msg="Prefer prefix ++/-- operators for non-primitive types."/>
* <error file="..\..\Sources\Application\ChannelConfigurationDlg.cpp" line="470" id="postfixOperator" severity="style" msg="Prefer prefix ++/-- operators for non-primitive types."/>
* <error file="..\..\Sources\Application\ChannelConfigurationDlg.cpp" line="497" id="unusedVariable" severity="style" msg="Unused variable: chBaudText"/>
* <error file="..\..\Sources\Application\ChannelConfigurationDlg.cpp" line="528" id="postfixOperator" severity="style" msg="Prefer prefix ++/-- operators for non-primitive types."/>
* <error file="..\..\Sources\Application\ChannelConfigurationDlg.cpp" line="540" id="unreadVariable" severity="style" msg="Variable 'nResult' is assigned a value that is never used."/>
* <error file="..\..\Sources\Application\ChannelConfigurationDlg.cpp" line="570" id="postfixOperator" severity="style" msg="Prefer prefix ++/-- operators for non-primitive types."/>
* <error file="..\..\Sources\Application\ChannelConfigurationDlg.cpp" line="590" id="postfixOperator" severity="style" msg="Prefer prefix ++/-- operators for non-primitive types."/>
* <error file="..\..\Sources\Application\ConfigAdapter.cpp" line="470" id="unreadVariable" severity="style" msg="Variable 'pbyTemp' is assigned a value that is never used."/>
* <error file="..\..\Sources\Application\ConfigDetails.cpp" line="1742" id="unreadVariable" severity="style" msg="Variable 'bIsLoading' is assigned a value that is never used."/>
* <error file="..\..\Sources\Application\ElementSelection.cpp" line="194" id="unreadVariable" severity="style" msg="Variable 'm_bCreateSuccess' is assigned a value that is never used."/>
* <error file="..\..\Sources\Application\FIBEX_Structs.h" line="378" id="memsetClass" severity="error" msg="Using 'memset' on struct that contains a 'std::string'."/>
* <error file="..\..\Sources\Application\FlexRayDatabaseDissociateDlg.cpp" line="149" id="unreadVariable" severity="style" msg="Variable 'bDBDeleted' is assigned a value that is never used."/>
* <error file="..\..\Sources\Application\FlexRayNetworkStatsDlg.cpp" line="241" id="unreadVariable" severity="style" msg="Variable 'lDataValue' is assigned a value that is never used."/>
* <error file="..\..\Sources\Application\FlexRayNetworkStatsDlg.cpp" line="244" id="unreadVariable" severity="style" msg="Variable 'lTotalB' is assigned a value that is never used."/>
* <error file="..\..\Sources\Application\MainFrm.cpp" line="18421" id="bufferAccessOutOfBounds" severity="error" msg="Buffer is accessed out of bounds: m_abLogOnConnect"/>
* <error file="..\..\Sources\Application\NetworkStatistics.cpp" line="529" id="unreadVariable" severity="style" msg="Variable 'nOrder' is assigned a value that is never used."/>
* <error file="..\..\Sources\Application\NetworkStatistics.cpp" line="610" id="unreadVariable" severity="style" msg="Variable 'bIsStatCreated' is assigned a value that is never used."/>
* <error file="..\..\Sources\Application\NotificWnd.cpp" line="297" id="unreadVariable" severity="style" msg="Variable 'lpPreviousCount' is assigned a value that is never used."/>
* <error file="..\..\Sources\Application\NotificWnd.cpp" line="306" id="variableScope" severity="style" msg="The scope of the variable 's_nDx' can be reduced."/>
* <error file="..\..\Sources\Application\NotificWnd.cpp" line="388" id="unreadVariable" severity="style" msg="Variable 'tempBuffAddress' is assigned a value that is never used."/>
* <error file="..\..\Sources\Application\NotificWnd.cpp" line="501" id="unreadVariable" severity="style" msg="Variable 'tempBuffAddress' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_ETAS_BOA\HardwareListing.cpp" line="620" id="stlSize" severity="style" msg="Possible inefficient checking for 'mHardwareListMap' emptiness."/>
* <error file="..\..\Sources\CAN_ICS_neoVI\CAN_ICS_neoVI.cpp" line="1032" id="unreadVariable" severity="style" msg="Variable 'nReturn' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_ICS_neoVI\CAN_ICS_neoVI.cpp" line="1491" id="unreadVariable" severity="style" msg="Variable 'nResult' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_ICS_neoVI\CAN_ICS_neoVI.cpp" line="3099" id="unreadVariable" severity="style" msg="Variable 'iRetVal' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_ICS_neoVI\CAN_ICS_neoVI.cpp" line="3113" id="unreadVariable" severity="style" msg="Variable 'iRetVal' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_ICS_neoVI\CAN_ICS_neoVI.cpp" line="3185" id="unreadVariable" severity="style" msg="Variable 'iRetVal' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_ICS_neoVI\HardwareListing.cpp" line="661" id="unreadVariable" severity="style" msg="Variable 'nSelected' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_ICS_neoVI\HardwareListing.cpp" line="666" id="unreadVariable" severity="style" msg="Variable 'nArrayIndex' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_ISOLAR_EVE_VCAN\CAN_ISOLAR_EVE_VCAN.cpp" line="158" id="unreadVariable" severity="style" msg="Variable 'ClientId' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_ISOLAR_EVE_VCAN\CAN_ISOLAR_EVE_VCAN.cpp" line="159" id="unreadVariable" severity="style" msg="Variable 'Index' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_ISOLAR_EVE_VCAN\CAN_ISOLAR_EVE_VCAN.cpp" line="456" id="unreadVariable" severity="style" msg="Variable 'nStrLen' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_ISOLAR_EVE_VCAN\CAN_ISOLAR_EVE_VCAN.cpp" line="829" id="unreadVariable" severity="style" msg="Variable 'sAckMap' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_IXXAT_VCI\HardwareListing.cpp" line="661" id="unreadVariable" severity="style" msg="Variable 'nSelected' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_IXXAT_VCI\HardwareListing.cpp" line="666" id="unreadVariable" severity="style" msg="Variable 'nArrayIndex' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_Kvaser_CAN\AcceptanceFilterDlg.cpp" line="170" id="unreadVariable" severity="style" msg="Variable 'bButtonChecked' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_Kvaser_CAN\CAN_Kvaser_CAN.cpp" line="1561" id="unreadVariable" severity="style" msg="Variable 'nStatus' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_Kvaser_CAN\CAN_Kvaser_CAN.cpp" line="1675" id="unreadVariable" severity="style" msg="Variable 'unClientIndex' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_Kvaser_CAN\CAN_Kvaser_CAN.cpp" line="1903" id="unreadVariable" severity="style" msg="Variable 's' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_Kvaser_CAN\CAN_Kvaser_CAN.cpp" line="1914" id="unreadVariable" severity="style" msg="Variable 's' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_Kvaser_CAN\CAN_Kvaser_CAN.cpp" line="2456" id="unreadVariable" severity="style" msg="Variable 'nStrLen' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_Kvaser_CAN\ChangeRegisters.cpp" line="807" id="unreadVariable" severity="style" msg="Variable 'unClockFreq' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_Kvaser_CAN\ChangeRegisters.cpp" line="1090" id="unreadVariable" severity="style" msg="Variable 'nColumnCount' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_Kvaser_CAN\ChangeRegisters.cpp" line="1769" id="unreadVariable" severity="style" msg="Variable 'pcStopStr' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_Kvaser_CAN\HardwareListing.cpp" line="659" id="unreadVariable" severity="style" msg="Variable 'nSelected' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_Kvaser_CAN\HardwareListing.cpp" line="664" id="unreadVariable" severity="style" msg="Variable 'nArrayIndex' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_NSI\AcceptanceFilterDlg.cpp" line="170" id="unreadVariable" severity="style" msg="Variable 'bButtonChecked' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_NSI\CAN_NSI.cpp" line="643" id="unreadVariable" severity="style" msg="Variable 'nStatus' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_NSI\CAN_NSI.cpp" line="914" id="unreadVariable" severity="style" msg="Variable 'nStrLen' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_NSI\CAN_NSI.cpp" line="1436" id="unreadVariable" severity="style" msg="Variable 'nChannelCount' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_NSI\CAN_NSI.cpp" line="1722" id="unreadVariable" severity="style" msg="Variable 'pchPCMCIA' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_NSI\CAN_NSI.cpp" line="1855" id="unreadVariable" severity="style" msg="Variable 'nUsedFlags' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_NSI\CAN_NSI.cpp" line="1902" id="unreadVariable" severity="style" msg="Variable 'unClientIndex' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_NSI\CAN_NSI.cpp" line="1916" id="unreadVariable" severity="style" msg="Variable 'ret' is assigned a value that is never used."/>
* <error file="..\..\Sources\CAN_NSI\CAN_NSI.cpp" line="1906" id="unreadVariable" severity="style" msg="Variable 'nUsedFlags' is assigned a value that is never used."/>
* <error file="..\..\Sources\DataTypes\Cluster.h" line="86" id="unreadVariable" severity="style" msg="Variable 'i' is assigned a value that is never used."/>

... and updated the cppcheck suppressions file.

Signed-off-by: Tobias Lorenz <tobias.lorenz@etas.com>