Add the ability to check if the pixel format on the current window was
previously set by wglSetPixelFormatWine(), and if was, allow the
application to change it with a regular wglSetPixelFormat call.
Signed-off-by: Connor McAdams <cmcadams@codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>