From 9a9b7fca9c1ac79316f3a9448d294612eb85ddc1 Mon Sep 17 00:00:00 2001
From: Michael Irwin <mdi@livej.am>
Date: Sun, 29 Jul 2012 13:50:01 +0200
Subject: [PATCH] Don't assume sort data is present

---
 jquery.isotope.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/jquery.isotope.js b/jquery.isotope.js
index fcf66a8..9e5f8c5 100644
--- a/jquery.isotope.js
+++ b/jquery.isotope.js
@@ -578,7 +578,9 @@
     },
 
     _getSorter : function( elem, sortBy ) {
-      return $.data( elem, 'isotope-sort-data' )[ sortBy ];
+      if ($.data( elem, 'isotope-sort-data' )) {
+        return $.data( elem, 'isotope-sort-data' )[ sortBy ];
+      }
     },
 
     // ====================== Layout Helpers ======================