[PATCH 0/1] MR3935: user32/tests: Use a child window for test_PeekMessage3.

[Esme Povirk (＠madewokherd)]

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=54026

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https://gitlab.winehq.org/wine/wine/-/merge_requests/3935