Comment # 1 on bug 1082306 from Michal Srb

At first look it looks like another fix on top of
u_mesa-8.0-llvmpipe-shmget.patch, but after closer investigation it seems to be
fixing an independent issue. The patch description says:

> When glXBindTexImageEXT is called and SWrast is used there
> will be a crash when sPriv->swrast_loader->getImage() is
> called from swrastSetTexBuffer2(). Reason: no memory has
> been allocated for the destination thus texImage->Data is
> NULL. Call ctx->Driver.TexImage2D() to initialize this. If
> memory has been allocated in a previous call free it first.

The patch is not applied at the moment and nobody is complaining. The original
issue may have been fixed in Mesa some other way, or maybe there just aren't
any users with swrast + application that uses GLX_EXT_texture_from_pixmap.

I will try to reproduce the original issue.