[PATCH 0/1] MR6234: win32u: Always use the dummy surface if a surface isn't needed.

[Rémi Bernon (＠rbernon)]

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=57033

We don't need a surface when the drawing rect is empty, and it can even FPE if we use one. Release any previously created surface in this case and use the dummy surface.