From 572e5bc710bc404463195a5dd1ab628a76e7d768 Mon Sep 17 00:00:00 2001
From: Andrew Ozz <azaozz@git.wordpress.org>
Date: Mon, 9 Dec 2013 04:20:26 +0000
Subject: [PATCH] Fix error in postbox.js attempting to change screen columns
 on mobile devices orientation changes, fixes #26493.

git-svn-id: https://develop.svn.wordpress.org/trunk@26822 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-admin/js/postbox.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/wp-admin/js/postbox.js b/src/wp-admin/js/postbox.js
index 4cc98c37db..a314dcd149 100644
--- a/src/wp-admin/js/postbox.js
+++ b/src/wp-admin/js/postbox.js
@@ -155,7 +155,10 @@ var postboxes;
 
 		_pb_edit : function(n) {
 			var el = $('.metabox-holder').get(0);
-			el.className = el.className.replace(/columns-\d+/, 'columns-' + n);
+
+			if ( el ) {
+				el.className = el.className.replace(/columns-\d+/, 'columns-' + n);
+			}
 		},
 
 		_pb_change : function() {