[Bug 21060] MCI open+play .avi hangs

http://bugs.winehq.org/show_bug.cgi?id=21060

--- Comment #6 from Jörg Höhle  2012-11-07 04:26:03 CST ---
Created attachment 42426
  --> http://bugs.winehq.org/attachment.cgi?id=42426
Fix mciavi player deadlock when starting to play.

Re-reading bug #14785, comment #2, I was enlightened.  This is not an issue
about windows messaging at all rather that a plain and simple dead-lock
resulting from abuse of critical sections.

Please try out whether my patch helps with the other mciavi hangs that you know
from comment #2.