[2/2] kernel32/tests: Add a test to show that WaitCommEvent should fail if there is a pending wait.

[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://newtestbot.winehq.org/JobDetails.pl?Key=1957

Your paranoid android.


=== w7pro64 (32 bit comm) ===
comm.c:850: Test failed: WaitCommEvent failed with a timeout
comm.c:862: recovering after WAIT_TIMEOUT...
comm.c:874: Test failed: WaitCommEvent error 0
comm.c:876: Test failed: WaitCommEvent: expected EV_TXEMPTY, got 0
comm.c:880: WaitCommEvent for EV_TXEMPTY took 1014 ms (timeout 1000)
comm.c:882: Test failed: WaitCommEvent used 1014 ms for waiting
comm.c:970: recovering after WAIT_TIMEOUT...
comm.c:1549: test_AbortWaitCts timeout 500 handle 00000130
comm.c:1516:  Changing CommMask on the fly for handle 00000130 after timeout 500