Index: channels/chan_zap.c
===================================================================
RCS file: /usr/cvsroot/asterisk/channels/chan_zap.c,v
retrieving revision 1.162
diff -u -r1.162 chan_zap.c
--- channels/chan_zap.c	10 Jan 2004 23:47:46 -0000	1.162
+++ channels/chan_zap.c	12 Jan 2004 05:14:43 -0000
@@ -6973,7 +6973,7 @@
 		return -1;
 	}
 	if (!ast_mutex_lock(&monlock)) {
-		if (monitor_thread) {
+		if (monitor_thread && (monitor_thread != -2)) {
 			pthread_cancel(monitor_thread);
 			pthread_kill(monitor_thread, SIGURG);
 			pthread_join(monitor_thread, NULL);