MT#56471 don't run media player when shut down

We use next_run.tv_sec as flag to signal shut down of the media player
timer. Don't even call the run function when the timer has already been
shut down.

Change-Id: I68248ce05e368bd17ed1a6d346f125c035d0da07

daemon/media_player.c

@@ -1184,7 +1184,9 @@ static void media_player_run(void *ptr) {
 	rwlock_lock_r(&call->master_lock);
 	mutex_lock(&mp->lock);
 
-	bool finished = mp->run_func(mp);
+	bool finished = false;
+	if (mp->next_run.tv_sec)
+		finished = mp->run_func(mp);
 
 	mutex_unlock(&mp->lock);
 	rwlock_unlock_r(&call->master_lock);