add try catch over publish

mqttclient.js

@@ -59,8 +59,13 @@ MQTTClient.prototype.resetbroker = function(topic, payload) {
 
 
 MQTTClient.prototype.publish = function(topic, payload) {
 MQTTClient.prototype.publish = function(topic, payload) {
 	if (this.client && this.client.connected) {
 	if (this.client && this.client.connected) {
+        try {
             this.client.publish(topic, payload);
             this.client.publish(topic, payload);
         }
         }
+        catch(e) {
+            
+        }
+	}
 	else {
 	else {
 	}
 	}
 }
 }