[PATCH 2/2] winemac: Clear OpenGL views to black the first time a context is attached.

[Ken Thomases]

This prevents VRAM garbage from being displayed before the program draws.
---
dlls/winemac.drv/cocoa_opengl.h |    2 ++
dlls/winemac.drv/cocoa_opengl.m |   33 ++++++++++++++++++++++++++++++++-
dlls/winemac.drv/cocoa_window.m |   13 +++++++++++++
3 files changed, 47 insertions(+), 1 deletions(-)

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