[macos] Add callbacks for Gdk.DrawContext.empty_frame
To avoid message like:
(<unknown>:89801): Gdk-WARNING **: 12:44:52.525: FIXME: Implement GdkDrawContext.empty_frame in GdkMacosGLContext
I added an empty implementation.
To avoid message like:
(<unknown>:89801): Gdk-WARNING **: 12:44:52.525: FIXME: Implement GdkDrawContext.empty_frame in GdkMacosGLContext
I added an empty implementation.