[Bug 35133] The Incredible Adventures of Van Helsing (Steam) crashes with built-in d3dx9_36

https://bugs.winehq.org/show_bug.cgi?id=35133

--- Comment #11 from Anastasius Focht  ---
Hello Béla,

thanks for the backtrace.

--- snip ---
wine: Unhandled page fault on write access to 0x00000000 at address 0x7e802156
(thread 0063), starting debugger...
...
Register dump:
 CS:0073 SS:007b DS:007b ES:007b FS:0033 GS:003b
 EIP:7e802156 ESP:02dbe360 EBP:02dbe3e8 EFLAGS:00010202(  R- --  I   - - - )
 EAX:00000000 EBX:7e84e000 ECX:02dbe340 EDX:02dbe380
 ESI:02dbe390 EDI:0221d860
...
Backtrace:
=>0 0x7e802156 D3DXIntersectTri+0x176(p0=<couldn't compute location>,
p1=<couldn't compute location>, p2=<couldn't compute location>,
praypos=<couldn't compute location>, praydir=<couldn't compute location>,
pu=<couldn't compute location>, pv=<couldn't compute location>, pdist=<couldn't
compute location>) [/home/gyebro/sources/wine-1.7.26/dlls/d3dx9_36/mesh.c:2410]
in d3dx9_36 (0x02dbe3e8)
  1 0x00a0e7b3 in vanhelsing_x86 (+0x60e7b2) (0x02dbe430)
...
0x7e802156 D3DXIntersectTri+0x176
[/home/gyebro/sources/wine-1.7.26/dlls/d3dx9_36/mesh.c:2410] in d3dx9_36: fstps
   0x0(%eax)
2410                *pu = vec.x;
Modules:
Module    Address            Debug info    Name (141 modules)
PE      340000-  3c3000    Deferred        physx3cooking_x86
PE      400000- 233b000    Export          vanhelsing_x86
PE     2340000- 24da000    Deferred        physx3common_x86
PE     4fd0000- 50a1000    Deferred        steam
PE     7140000- 71ce000    Deferred        xaudio2_7
PE    10000000-102e0000    Deferred        physx3_x86
PE    30000000-302c1000    Deferred        steam2
PE    38000000-38906000    Deferred        steamclient
PE    3b400000-3b41d000    Deferred        steam_api
PE    3f000000-3f0b0000    Deferred        tier0_s
PE    3f600000-3f652000    Deferred        vstdlib_s
PE    60000000-60021000    Deferred        cserhelper
...
Threads:
process  tid      prio (all id:s are in hex)
...
00000061 (D) C:\Program Files\Steam\steamapps\common\The Incredible Adventures
of Van Helsing\VanHelsing_x86.exe
    00000066   15
    00000065   15
    0000003d    0
    00000027    0
    00000026    0
    00000025    0
    0000004b    0
    0000004c    0
    00000067    0
    00000064    0
    00000063    0 <==
    00000062    0
--- snip ---

It seems the barycentric hit coordinate out parameters (U,V) are optional.

There are various DX game engine/example snippets floating around that pass
NULL for these:

https://stackoverflow.com/questions/11161165/d3dxintersecttri-parts-of-my-me...

--- snip ---
  if(D3DXIntersectTri(&v1,&v2,&v3, &rayObjOrigin, &rayObjDirection, NULL, NULL,
&distanceToCollision))
  {
    hasHit = true;
  }   
--- snip ---

MSDN:
http://msdn.microsoft.com/en-us/library/windows/desktop/bb172885%28v=vs.85%2...

Regards