Put event forwarder in the right scope

Fix broken variable

JitsiConferenceEventManager.js

             conference.leave.bind(conference);
         });
 
+    this.chatRoomForwarder.forward(XMPPEvents.MUC_LOCK_CHANGED,
+        JitsiConferenceEvents.LOCK_STATE_CHANGED);
+
     chatRoom.addListener(XMPPEvents.MUC_MEMBER_JOINED,
         conference.onMemberJoined.bind(conference));
     chatRoom.addListener(XMPPEvents.MUC_MEMBER_LEFT,
                 JitsiConferenceEvents.ENDPOINT_MESSAGE_RECEIVED,
                 conference.getParticipantById(from), payload);
         });
-
-    this.chatRoomForwarder.forward(XMPPEvents.MUC_LOCK_CHANGED,
-        JitsiConferenceEvents.LOCK_STATE_CHANGED);
 };
 
 /**

modules/xmpp/ChatRoom.js

         }
     }
 
-    if (from==this.myroomjid && $(pres).find('>x[xmlns="http://jabber.org/protocol/muc#user"]>status[code="104"]').length) {
+    if (from==this.myroomjid && $(msg).find('>x[xmlns="http://jabber.org/protocol/muc#user"]>status[code="104"]').length) {
       this.discoRoomInfo();
     }