[PATCH] winex11: Allow user to set WM_CLASS

[Marvin]

Hi,

While running your changed tests, 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=91250

Your paranoid android.


=== debiant2 (build log) ===

Task: Patch failed to apply

=== debiant2 (build log) ===

Task: Patch failed to apply