Update.

1998-12-29  Ulrich Drepper  <drepper@cygnus.com>

	* semaphore.c (sem_trywait): Don't forget to unlock the semaphore
	lock.  Patch by Bernd Schmidt <crux@pool.informatik.rwth-aachen.de>.

linuxthreads/semaphore.c

@@ -77,6 +77,7 @@ int sem_trywait(sem_t * sem)
     sem->sem_value--;
     retval = 0;
   }
+  __pthread_unlock((struct _pthread_fastlock *) &sem->sem_lock);
   return retval;
 }