Fixed cleaner might not clean user not in connected list and handle if the user socket not exist

Author: jackycute

lib/realtime.js

@@ -103,13 +103,19 @@ var updater = setInterval(function () {
         if (err) return logger.error('updater error', err);
     });
 }, 1000);
-//clean when user not in any rooms
+//clean when user not in any rooms or user not in connected list
 var cleaner = setInterval(function () {
     async.each(Object.keys(users), function (key, callback) {
         var socket = realtime.io.sockets.connected[key];
-        if (socket && (!socket.rooms || socket.rooms.length <= 0)) {
+		if ((!socket && users[key]) ||
+			(socket && (!socket.rooms || socket.rooms.length <= 0))) {
             if (config.debug)
                 logger.info("cleaner found redundant user: " + key);
+			if (!socket) {
+				socket = {
+					id: key
+				};
+			}
             disconnectSocketQueue.push(socket);
             disconnect(socket);
         }