kpfleming's fix from r9472 backported to 1.2

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@9493 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -11342,7 +11342,7 @@ static int restart_monitor(void)
 		pthread_kill(monitor_thread, SIGURG);
 	} else {
 		/* Start a new monitor */
-		if (ast_pthread_create(&monitor_thread, &attr, do_monitor, NULL) < 0) {
+		if (ast_pthread_create(&monitor_thread, NULL, do_monitor, NULL) < 0) {
 			ast_mutex_unlock(&monlock);
 			ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
 			return -1;