Some additional error checking for when no master is defined

example.json

@@ -16,5 +16,5 @@
         "username": null,
         "authtype": null
     },
-    "Master": []
+    "Master": [null, null]
 }

threshold

@@ -370,6 +370,8 @@ class Helper(object):
     def sendMaster(self, data):
         if config["Master"][0] in IRCPool.keys():
             IRCPool[config["Master"][0]].msg(config["Master"][1], data)
+        else:
+            warning("Master with no IRC instance defined")
         for i in MonitorPool:
             connections[i].send(data)