Fix socket.io change on room's socket list

This change isn't even listed in the changelog, but fatal:
io.sockets.adapter.rooms[<room name>] seems to be an Object of type Room now, having a the list of its sockets in an property "sockets".
Before version 1.4.0, the map of sockets was directly accessable by the call (there was no Room object)...

Moved logic for iterating the room's sockets to a new method _iterateEachJoinedSocket() though. So future changes to the API (which are very likely) can be modified on one place in the code...

src_coffee/server/channel.coffee

@@ -192,13 +192,9 @@ class Channel
         @_sendToRoom('deleted', deleteInfo, false)
         # Kick all sockets out of room
-        clientMetaList = io.sockets.adapter.rooms[@name]
-
-        for clientID of clientMetaList
-            currClientSocket = io.sockets.connected[clientID]  # This is the socket of each client in the room
-            if currClientSocket?
-                @_unregisterListeners(currClientSocket)
-                currClientSocket.leave(@name)
+        @_iterateEachJoinedSocket (currClientSocket) =>
+            @_unregisterListeners(currClientSocket)
+            currClientSocket.leave(@name)
         # Update the list of unique identities (Should now be empty)
         @_updateUniqueClientsMap()
@@ -365,16 +361,10 @@ class Channel
     _getUniqueClientsMap: (forceUpdate=false) ->
         if forceUpdate
-            #clientSocketList = io.sockets.clients(@name)  # Working till v0.9.x
-            clientMetaList = io.sockets.adapter.rooms[@name]
             clientsMap = {}
-
-            for clientID of clientMetaList
-                clientSocket = io.sockets.connected[clientID]  # This is the socket of each client in the room
-
-                if clientSocket?
-                    clientIdentity = clientSocket.identity
-                    clientsMap[clientIdentity.getGlobalID()] = clientIdentity if clientIdentity?
+            @_iterateEachJoinedSocket (clientSocket) =>
+                clientIdentity = clientSocket.identity
+                clientsMap[clientIdentity.getGlobalID()] = clientIdentity if clientIdentity?
         else
             clientsMap = @uniqueClientsMap or {}
@@ -393,6 +383,17 @@ class Channel
         return userList
+    _iterateEachJoinedSocket: (iterationCallback) ->
+        #clientSocketList = io.sockets.clients(@name)  # Working till v0.9.x
+        clientMetaList = io.sockets.adapter.rooms[@name]
+        clientMetaList = clientMetaList?.sockets or clientMetaList or {}  # There's no sockets property till v0.3.x
+
+        for clientID of clientMetaList
+            clientSocket = io.sockets.connected[clientID]  # This is the socket of each client in the room
+
+            # Call back on every real socket
+            iterationCallback(clientSocket) if clientSocket?
+
 ## Export class