Re: Endless WM_PAINT loop fix

[Alexandre Julliard]

Rein Klazes  writes:
> Changelog:
>    windows		: painting.c
>    If RedrawWindow is called with the RDW_INVALIDATE flag, if the 	
>    UpdateRgn parameter is a NULLREGION and the Window has no update
>    region yet, ignore the call.

This should be integrated with the update region calculations, we
shouldn't add such special cases outside of the main code.