Fixes issue in merging pings.

modules/xmpp/xmpp.js

 
             logger.info("My Jabber ID: " + self.connection.jid);
 
-            self.connection.ping.startInterval(config.hosts.domain);
+            self.connection.ping.startInterval(
+                Strophe.getDomainFromJid(self.connection.jid));
             
             if (password)
                 authenticatedUser = true;