WGL: Fix a major ATI regression

[Roderick Colenbrander]

Hi,

Our beloved ATI drivers again have some nice problems. The latest 8.41.7 uses a new codebase and is a lot faster (and perhaps a lot less buggy in GL stuff). In GLX it is buggier than ever.

GLX uses 'GLXFBConfigs' as pixel formats. Normally onscreen pixel formats are associated with a X visual of which you can query the id using GLX_VISUAL_ID. For some reason this returns 0 on 8.41.7. A different codepath (XVisualInfo *vis = glXGetVisualFromFBConfig(..)) works though. We must use this to support any form of 3D on Wine (and lots of users will upgrade to this version).

The change isn't a hack but more a workaround. I have submitted the bugreport to ATI but they likely won't fix it anytime soon.

Regards,
Roderick Colenbrander
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