[Bug 13643] ddraw tests fail on XP SP2 with Radeon Mobility 9000 card

http://bugs.winehq.org/show_bug.cgi?id=13643

--- Comment #2 from James Hawkins   2008-06-03 11:28:23 ---
When I look at these tests, my gut feeling is that some member(s) of the
vp_data struct is being messed with in the first call to SetViewport (I'm
particularly thinking about vp_data.dwSize) and that messes up the remaining
calls to SetViewport.  When I tried to run ddraw_test.exe built by me, and even
winetest.exe built by me, I don't get the failures (thus I can't debug the
members of vp_data).  These failures happen on real machines and VMs, so I
don't think it's a driver bug.