[PATCH 0/2] MR7142: win32u: Reset surface clip region if it matches the visible rect.

[Rémi Bernon (＠rbernon)]

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=57665

With an empty clipping region, when the window is being shown, the Expose event we receive is ignored by `expose_window_surface`, assuming there's no redraw necessary. If a clipping region is set, we call `NtUserRedrawWindow` with `RDW_ERASE` which clears the window.