[Pierre-Marie Baty]

sPlO, instead of putting your checks in pfnIndexOfEntOffset() and the likes, just #undef the INDEXENT and ENTINDEX macros and redefine them with your check included.

If you want to FIX that bug (and not PATCH it), instead of just returning from ENTINDEX when the pointer is NULL, provoke a crash here (by a zero divide, for example). This way when Windows will crash, you can click on "Debug" and the debugger will kick in right at the spot where ENTINDEX was called.