WIP: Protect concurrent calls to XOpenIM/XCloseIM with a lock
This fixes a bug where concurrent threads call XOpenIM double freeing memory or freezing the process.
Fixes: #31
- https://bugs.freedesktop.org/show_bug.cgi?id=69088
- Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=47366
- https://www.winehq.org/pipermail/wine-devel/2019-September/150677.html
Signed-off-by: Bernhard Übelacker bernhardu@mailbox.org