[1/2] user32/tests: Add PeekMessage(PM_NOREMOVE) call to inter-thread messages test.

[Marvin]

Hi,

While running your changed tests on Windows, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?
Full results can be found at
https://testbot.winehq.org/JobDetails.pl?Key=12901

Your paranoid android.


=== wvistau64 (32 bit msg) ===
msg.c:10471: Test failed: expected PeekMessage to return FALSE, got 1

=== w7u (32 bit msg) ===
msg.c:12230: Test failed: unexpected hwnd 0014013C
msg.c:12252: Test failed: bad time 30fa9/30fb8