add missing error parameter to xhr error handling

Author: Djones4822

src/browser/AppVersionProxy.js

@@ -24,7 +24,7 @@ function readConfig(success, fail) {
             }
         });
 
-        xhr.addEventListener("error", function () {
+        xhr.addEventListener("error", function (e) {
             fail(e);
         });
         xhr.open("get", "config.xml", true);