Merge pull request #107 from igurisandhu/fix/negated-expression-bug-101

fix: correct negated expression for Object.defineProperty check (#101)

Author: drawcall

example/game/crafty/js/crafty.js

@@ -4303,7 +4303,7 @@ Crafty.storage = (function () {
     * Is `Object.defineProperty` supported?
     */
     support.defineProperty = (function () {
-        if (!'defineProperty' in Object) return false;
+        if (!('defineProperty' in Object)) return false;
         try { Object.defineProperty({}, 'x', {}); }
         catch (e) { return false };
         return true;