Replace stray references to ext.js functions

server/middleware/im/hub.js

@@ -18,14 +18,14 @@ var Hub = module.exports = function Hub(options) {
         }, this.reapInterval, this);
     }
 
-    this.events.addListener('update', (function(package) {
+    this.events.addListener('update', o_.bind(function(package) {
         if(package.constructor === exports.Offline) {
             for(var i = 0, l = this.users.length; i < l; i++) {
                 if(this.users[i].get('username') == package.user)
                     this.users.splice(i, 1);
             }
         }
-    }).bind(this));
+    }, this));
 };
 
 Hub.prototype.destroy = function(sid, fn) {

server/middleware/im/user.js

@@ -1,5 +1,6 @@
 var events = require('events'),
-    packages = require('../../libs/packages');
+    packages = require('../../libs/packages'),
+    o_ = require('../../libs/utils');
 
 var User = module.exports = function(id, data) {
     this.id = id;
@@ -12,7 +13,7 @@ var User = module.exports = function(id, data) {
     this.events = new events.EventEmitter();
     this.status = packages.STATUSES[0];
 
-    setInterval(this._expireConns.bind(this), 500);
+    setInterval(o_.bind(this._expireConns, this), 500);
 };
 
 User.prototype.receivedUpdate = function(package) {