fix for issue #25

xmpp = require("simple-xmpp")
xmpp.connect {jid: , password: , host: "talk.google.com", port: 5222)

TypeError: Cannot read property 'attrs' of undefined
at Client. (/node_modules/simple-xmpp/lib/simple-xmpp.js:281:45)
at Client.EventEmitter.emit (events.js:95:17)
at Client.onRawStanza (/node_modules/simple-xmpp/node_modules/node-xmpp/lib/xmpp/client.js:159:14)