Tim Bechmann patch : hammerfall, only release monitor thread, if it has been created.

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@3571 0c269be4-1314-0410-8aa9-9f06e86f4224

ChangeLog

@@ -24,6 +24,10 @@ Paul Davis
 ---------------------------
   Jackdmp changes log
 ---------------------------
+
+2009-06-30 Stephane Letz  <letz@grame.fr>
+
+	* Tim Bechmann patch : hammerfall, only release monitor thread, if it has been created.
 
 2009-06-19 Stephane Letz  <letz@grame.fr>
 

linux/alsa/hammerfall.c

@@ -206,8 +206,10 @@ hammerfall_release (jack_hardware_t *hw)
 		return;
 	}
 
-	pthread_cancel (h->monitor_thread);
-	pthread_join (h->monitor_thread, &status);
+    if (h->monitor_thread) {
+        pthread_cancel (h->monitor_thread);
+        pthread_join (h->monitor_thread, &status);
+    }
 
 	free (h);
 }