[Bug 53281] New: d3d9:d3d9ex - test_wndproc() sometimes gets an unexpected WM_WINDOWPOSCHANGED on Windows 8+

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=53281

Bug ID: 53281
           Summary: d3d9:d3d9ex - test_wndproc() sometimes gets an
                    unexpected WM_WINDOWPOSCHANGED on Windows 8+
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: directx-d3d
          Assignee: [e-mail]
          Reporter: [e-mail]

d3d9:d3d9ex - test_wndproc() sometimes gets an unexpected WM_WINDOWPOSCHANGED
on Windows 8+:

d3d9ex.c:3117: Test failed: Received WM_WINDOWPOSCHANGED but did not expect it,
i=0.
(also happens with i=1)

https://test.winehq.org/data/patterns.html#ddraw:ddraw1

Note that a similar failure seems to happen with KDE in Wine but there is more
than one WM_WINDOWPOSCHANGED message so it may be different (see fg-deb64).