Fix passing around turn credentials

coffee/room.coffee

@@ -58,7 +58,11 @@ class palava.Room extends @EventEmitter
       for peer in msg.peers
         offers = !palava.browser.isChrome()
         newPeer = new palava.RemotePeer(peer.peer_id, peer.status, @, offers)
-      @emit "joined", msg.own_id, msg.turn_user, msg.turn_password
+      if msg.turn_user
+        turnCredentials = { user: msg.turn_user, password: msg.turn_password }
+      else
+        turnCredentials = null
+      @emit "joined", msg.own_id, turnCredentials
 
     @distributor.on 'new_peer', (msg) =>
       offers = msg.status.user_agent == 'chrome'

coffee/session.coffee

@@ -159,10 +159,8 @@ class palava.Session extends @EventEmitter
       @tearDown(true)
       @emit 'room_join_error', @room
     @room.on 'full',                        => @emit 'room_full',       @room
-    @room.on 'joined',               (u, p) =>
-      @turnCredentials =
-        user: tu
-        password: tpw
+    @room.on 'joined', (ownId, turnCredentials) =>
+      @turnCredentials = turnCredentials
       @emit 'room_joined', @room
     @room.on 'left',                        => @emit 'room_left',       @room
     @room.on 'peer_joined',             (p) => @emit 'peer_joined', p
@@ -173,9 +171,9 @@ class palava.Session extends @EventEmitter
     @room.on 'peer_stream_removed',     (p) => @emit 'peer_stream_removed', p
     @room.on 'peer_connection_pending',      (p) => @emit 'peer_connection_pending', p
     @room.on 'peer_connection_established',  (p) => @emit 'peer_connection_established', p
-    @room.on 'peer_connection_failed',       (p) =>
-      if !p.hasTriedTurn && @turnCredentials
-        p.tryTurn @turnCredentials
+    @room.on 'peer_connection_failed', (peer) =>
+      if !peer.hasTriedTurn && @turnCredentials
+        peer.tryTurn @turnCredentials
       else
         @emit 'peer_connection_failed', p
     @room.on 'peer_connection_disconnected', (p) => @emit 'peer_connection_disconnected', p