fixup: add namespace std:: in PVRDatabase, PVRGUIInfo, PVRmanager
fixup: add namespace std:: in pvr/addons
fixup: add namespace std:: in pvr/channels
fixup: add namespace std:: in pvr/dialogs
fixup: add namespace std:: in pvr/timers
fixup: add namespace std:: in pvr/recordings
fixup: add namespace std:: in pvr/windows