[Bug 6006] incorrect paint of invisible buttons

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=6006

------- Additional Comments From [e-mail]  2007-03-02 21:47 -------
Created an attachment (id=4772)
 --> (http://bugs.winehq.org/attachment.cgi?id=4772&action=view)
button-setfont.patch

When the main window is resized, the button turn visible, because the font is
changed.
The following patch fixes wine so it doesn't directly paint the button, but
instead invalidates it.
Test is included.

This patch has already been submitted to wine-patches but was not accepted.