fix room enter

public/src/app.js

@@ -184,6 +184,7 @@ app.cacheBuster = null;
 			}, function(err) {
 				if (err) {
 					app.alertError(err.message);
+					return;
 				}
 				app.currentRoom = room;
 			});

src/socket.io/meta.js

@@ -52,7 +52,7 @@ SocketMeta.buildTitle = function(socket, text, callback) {
 
 SocketMeta.rooms.enter = function(socket, data, callback) {
 	if (!socket.uid) {
-		return;
+		return callback();
 	}
 
 	if (!data) {
@@ -83,6 +83,7 @@ SocketMeta.rooms.enter = function(socket, data, callback) {
 			websockets.in(data.enter).emit('event:user_enter', data);
 		}
 	}
+	callback();
 };
 
 SocketMeta.rooms.getAll = function(socket, data, callback) {