a75b4af374
- don't unlock an already unlocked mutex (Someone wanted to be on the safe side with this, but the result is undefined and makes pthread_mutex_destroy fail. Reference: manpage for pthread_mutexattr_gettype/The Open Group[1]: "Attempting to unlock a mutex of this type which is not locked results in undefined behaviour.") - re-enabled all subsystem destructors again (this has been disabled because fgfs hung on exit, due to the mutex destroy failure from above.) Reference: http://www.opengroup.org/onlinepubs/007908799/xsh/pthread_mutexattr_gettype.html
[ Nothing here at this time. ]