dinput: Ensure X11 input events are forwarded to wineserver even without message loop.

[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=17964

Your paranoid android.


=== wvistau64 (32 bit mouse) ===
mouse.c:124: Test failed: IDirectInputDevice_Acquire() failed: 80070005
mouse.c:126: Test failed: IDirectInputDevice_Acquire() should have failed: 80070005
mouse.c:144: Test failed: Acquire() failed: 80070005