From 6140fb391dc1a76cc526108171dfdef4f44aea99 Mon Sep 17 00:00:00 2001
From: Michelle Bu <michelle@michellebu.com>
Date: Sat, 6 Jul 2013 22:33:13 -0700
Subject: [PATCH] Optional options

---
 lib/util.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/util.js b/lib/util.js
index 01b0e89..fbd7ab6 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -13,6 +13,7 @@ var util = {
     });
   },
   extend: function(dest, source) {
+    source = source || {}
     for(var key in source) {
       if(source.hasOwnProperty(key)) {
         dest[key] = source[key];