[5/5] user32: Skip menu loop for empty popup menus.

[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=7669

Your paranoid android.


=== w7u (32 bit msg) ===
msg.c:12099: Test failed: unexpected hwnd 003D013E
msg.c:12121: Test failed: bad time 30e71/30e80