Izmjenjena struktura, dodan backand

web/node_modules/es5-ext/object/ensure-natural-number-value.js

@@ -0,0 +1,9 @@
+"use strict";
+
+var ensure  = require("./ensure-natural-number")
+  , isValue = require("./is-value");
+
+module.exports = function (arg) {
+	if (!isValue(arg)) throw new TypeError(arg + " is not a natural number");
+	return ensure(arg);
+};