From 56768a4c9d26edd53d1ce8b04b1a4d26ad14eb57 Mon Sep 17 00:00:00 2001
From: liabru <liambrum@gmail.com>
Date: Wed, 19 Mar 2014 12:49:48 +0000
Subject: [PATCH] fixed issue with extending null properties

---
 src/core/Common.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/Common.js b/src/core/Common.js
index 03575f5..08f2ecf 100644
--- a/src/core/Common.js
+++ b/src/core/Common.js
@@ -35,7 +35,7 @@ var Common = {};
 
             if (source) {
                 for (var prop in source) {
-                    if (deepClone && source[prop].constructor === Object) {
+                    if (deepClone && source[prop] && source[prop].constructor === Object) {
                         if (!obj[prop] || obj[prop].constructor === Object) {
                             obj[prop] = obj[prop] || {};
                             Common.extend(obj[prop], deepClone, source[prop]);