Merge pull request #250 from jitsi/updates-lock-room

Always saves password as we can make several room join attempts.

modules/xmpp/ChatRoom.js

 };
 
 ChatRoom.prototype.join = function (password) {
-    if(password)
-        this.password = password;
+    this.password = password;
     var self = this;
     this.moderator.allocateConferenceFocus(function () {
         self.sendPresence(true);