If you're hanging up channels, be sure we clean it up...

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@6712 65c4cc65-6c06-0410-ace0-fbb531ad65f3

pbx.c

@@ -4999,12 +4999,16 @@ int ast_pbx_outgoing_exten(const char *type, int format, void *data, int timeout
 						ast_mutex_unlock(&chan->lock);
 					if (ast_pbx_run(chan)) {
 						ast_log(LOG_ERROR, "Unable to run PBX on %s\n", chan->name);
+						if (channel)
+							*channel = NULL;
 						ast_hangup(chan);
 						res = -1;
 					}
 				} else {
 					if (ast_pbx_start(chan)) {
 						ast_log(LOG_ERROR, "Unable to start PBX on %s\n", chan->name);
+						if (channel)
+							*channel = NULL;
 						ast_hangup(chan);
 						res = -1;
 					} 
@@ -5020,6 +5024,8 @@ int ast_pbx_outgoing_exten(const char *type, int format, void *data, int timeout
 						ast_cdr_failed(chan->cdr);
 				}
 			
+				if (channel)
+					*channel = NULL;
 				ast_hangup(chan);
 			}
 		}
@@ -5079,6 +5085,8 @@ int ast_pbx_outgoing_exten(const char *type, int format, void *data, int timeout
 		if (ast_pthread_create(&as->p, &attr, async_wait, as)) {
 			ast_log(LOG_WARNING, "Failed to start async wait\n");
 			free(as);
+			if (channel)
+				*channel = NULL;
 			ast_hangup(chan);
 			res = -1;
 			goto outgoing_exten_cleanup;