Use var with local variable

Author: pbrisbin

lib/fix-me.js

@@ -18,7 +18,7 @@ FixMe.prototype.runEngine = function(){
       self = this;
 
   if (fs.existsSync('/config.json')) {
-    overrides = JSON.parse(fs.readFileSync('/config.json'));
+    var overrides = JSON.parse(fs.readFileSync('/config.json'));
 
     for (var prop in overrides) {
         config[prop] = overrides[prop];