vkd3d: Unlock fence worker mutex before exiting.
Pthread mandates that a mutex must be unlocker before being destroyed. In pratice I doubt this make a difference on any platform (certainly it doesn't on Linux), but let's comply to standards.
Pthread mandates that a mutex must be unlocker before being destroyed. In pratice I doubt this make a difference on any platform (certainly it doesn't on Linux), but let's comply to standards.