[Bug 7360] hiding child incorrectly sets an update region on the grandparent

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=7360

------- Additional Comments From [e-mail]  2007-27-06 00:22 -------
What's the status of this bug?
Although not mentioned, my patch to add the necessary tests made it in before
the suggested patch to fix the bug.
I've asked wine-devel why the patch wasn't accepted, and got no response.