[PATCH 0/1] MR3553: opengl32: Skip debug callback messages called from native thread.

[Paul Gofman (＠gofman)]

Mesa sometimes calls debug message callback from its own Unix native thread. Then it inevitably crashes in KeUserModeCallback().

So far I spotted only harmless notification messages called this way:
```
Shader Stats: SGPRS: 24 VGPRS: 12 Code Size: 124 LDS: 0 Scratch: 0 Max Waves: 10 Spilled SGPRs: 0 Spilled VGPRs: 0 PrivMem VGPRs: 0 Outputs: 1 PatchOutputs: 0 DivergentLoop: 0 InlineUniforms: 0 (PS, W64)
```

So I guess the best is just to ignore the callbacks called from native threads. The only other solution I see in the current architecture is to spin a PE thread from opengl and poll for debug messages, but that looks less than ideal and probably doesn't worth it.