SIGSEGV in IDirectDrawImpl_EnumDisplayModes

[Lionel Ulmer]

> Apologies for needing some more hand-holding: from Alexander's advice I now 
> have the game linking and beginning to execute.  It now gets stuck while 
> executing this piece of C++:

Hmm, according to the backtrace, it is rather crashing when executing
'User_DirectDraw_EnumDisplayModes' (ie something like
mp_directDraw->EnumDisplayModes(...)) in the
tDirectDrawScreen::setUpWindowedSurfaces method.