[PATCH 0/1] MR9986: OpenGL32 check if HDC is invalid

[Goran Kovac (＠gorankovacstudio)]

Regression from 10.13 - https://bugs.winehq.org/show_bug.cgi?id=58506
When Waves VST tries to load it errors:

0024:warn:win:get_window_pixel_format getting format on win (nil) not
supported
0024:warn:opengl:update_context Failed to re-create context for
wglShareLists
0024:warn:opengl:wglMakeCurrent wglMakeCurrent returned 0xc0000005

After that it stucks in the loop and main app (DAW) needs to be SIGTERM.
Fix checks if the HDC is valid before going further. This makes Waves
VST load and work fine.

-- 
https://gitlab.winehq.org/wine/wine/-/merge_requests/9986