From 6dcb2764854cafda86ec87cfaafa41ccdf113bf4 Mon Sep 17 00:00:00 2001
From: Geoffrey Hing <geoffhing@gmail.com>
Date: Tue, 22 May 2012 11:40:42 -0500
Subject: [PATCH] Check for nonexistent data attribute in a way that works in
 jQuery 1.4.2

---
 select2.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/select2.js b/select2.js
index 210a1269..5edda9ca 100755
--- a/select2.js
+++ b/select2.js
@@ -352,7 +352,8 @@
             this.id=opts.id;
 
             // destroy if called on an existing component
-            if (opts.element.data("select2") !== undefined) {
+            if (opts.element.data("select2") !== undefined &&
+                opts.element.data("select2") !== null) {
                 this.destroy();
             }