message: set identity lang to empty (fix
diff: @@ -411,7 +411,7 @@ jsxc.xmpp = {
  sendPres: function() {
  // disco stuff
  if (jsxc.xmpp.conn.disco) {
  - jsxc.xmpp.conn.disco.addIdentity('client', 'web', 'JSXC');
  + jsxc.xmpp.conn.disco.addIdentity('client', 'web', 'JSXC', '');
  jsxc.xmpp.conn.disco.addFeature(Strophe.NS.DISCO_INFO);
  jsxc.xmpp.conn.disco.addFeature(Strophe.NS.RECEIPTS);
  jsxc.xmpp.conn.disco.addFeature(Strophe.NS.VERSION);
  