Fixed double tooltips ("Mute", "Umute", "No audio") in windows XP.
Minor grammar fix.
Merge pull request #82 from crdx/patch-1

Minor grammar fix
AviSplitter: MAXPACKETS_AVI increased to 1000 (more stable playback on old Semptron).
fixed "error C2039: 'IsEmpty' : is not a member of 'CListBox'" after b45f3796b0
cosmetics
Reduce variable scope.
remove unneeded variable
Enable C4701 for /W3.
MainFrm.cpp: remove unused variables.
VobSubFile.cpp: break after return doesn't make sense.
DX9SubPic.cpp: fix possible NULL pointer dereference.
Fix using potentially uninitialized local variable.
Avoid variable shadowing.
DX9RenderingEngine.cpp: Fix leaking memory due to an exception.
Use unsigned short instead of int in a few places that makes sense to do so.
Remove unneeded typedef.
Be consistent with function's variables.