Avoid IE8’s broken Object.defineProperty

IE 8 only supports `Object.defineProperty` on DOM elements, so detect that and fall back.

fromcodepoint.js

@@ -1,6 +1,15 @@
 /*! http://mths.be/fromcodepoint v0.1.0 by @mathias */
 if (!String.fromCodePoint) {
 	(function() {
+		var defineProperty = (function() {
+			// IE 8 only supports `Object.defineProperty` on DOM elements
+			try {
+				var object = {};
+				var $defineProperty = Object.defineProperty;
+				var result = $defineProperty(object, object, object) && $defineProperty;
+			} catch(error) {}
+			return result;
+		}());
 		var stringFromCharCode = String.fromCharCode;
 		var floor = Math.floor;
 		var fromCodePoint = function() {
@@ -40,8 +49,8 @@ if (!String.fromCodePoint) {
 			}
 			return result;
 		};
-		if (Object.defineProperty) {
-			Object.defineProperty(String, 'fromCodePoint', {
+		if (defineProperty) {
+			defineProperty(String, 'fromCodePoint', {
 				'value': fromCodePoint,
 				'configurable': true,
 				'writable': true