[Bug 36794] valgrind shows an invalid free for comctl32/tests/listview.c

https://bugs.winehq.org/show_bug.cgi?id=36794

--- Comment #2 from Austin English  ---
(In reply to Sebastian Lackner from comment #1)
> Created attachment 48898 [details]
> comctl32: Unset window pointer before deallocating the memory (Valgrind).
>
> Can you try this patch, please?

I can't get the bug to reliably occur in wine-1.7.20-122-gd2d62cf or
wine-1.7.21.