gallium/wgl: fix default pixel format issue
When creating a context without SetPixelFormat() don't blindly take the pixel format reported by GDI. Instead, look for our own closest pixel format. Minor clean-ups added by Brian Paul. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103412 Reviewed-by:Brian Paul <brianp@vmware.com> Tested-by:
Brian Paul <brianp@vmware.com>