Add missing var declaration to EventEmitter

Previous commit 11e9d2d forgot to add the var declaration here.

Fixes ESLint no-undef warnings using Airbnb ES5 config.

1 files changed, 1 insertions, 1 deletions

diff --git a/js/cheesesteak.js b/js/cheesesteak.js
index 1ee32b8..ea3b786 100644
--- a/js/cheesesteak.js
+++ b/js/cheesesteak.js
@@ -23,7 +23,7 @@
 /* jshint browser:true, jquery:true */
 (function() {
   // Lightweight EventEmitter implementation
-  EventEmitter = function() {};
+  var EventEmitter = function() {};
 
   EventEmitter.prototype.on = function(evt, fn) {
     this._events = this._events || {};