Don't crash when called with a NULL gl context

[Ulrich Czekalla]

Errors are essentially ignored in OpenGL. The function that provoked the
error should have no effect on the current state. OpenGL does keep track of
the last error in the context but when no context is available glGetError
returns GL_INVALID_OPERATION. Since we forward calls to the underlying
glGetError implementation we don't need to do anything special.


---
 dlls/winex11.drv/opengl.c |   38 +++++++++++++++++++++++++-------------
 1 files changed, 25 insertions(+), 13 deletions(-)
-------------- next part --------------
A non-text attachment was scrubbed...
Name: e908a10ead6500762d5109111b8d7613949ce2e8.diff
Type: text/x-patch
Size: 2160 bytes
Desc: not available
Url : http://www.winehq.org/pipermail/wine-patches/attachments/20061219/3b3c430a/e908a10ead6500762d5109111b8d7613949ce2e8.bin