From 8af2f4674fda4d30995946086b23f4727ac570c1 Mon Sep 17 00:00:00 2001
From: Daryl Koopersmith <koop@git.wordpress.org>
Date: Sat, 10 Nov 2012 09:57:28 +0000
Subject: [PATCH] Media: Account for a race condition when deleting an edit
 gallery frame. see #21390.

git-svn-id: https://develop.svn.wordpress.org/trunk@22530 602fd350-edb4-49c9-b593-d223f7449a82
---
 wp-includes/js/mce-view.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/wp-includes/js/mce-view.js b/wp-includes/js/mce-view.js
index 3078ed7e56..5e838873ae 100644
--- a/wp-includes/js/mce-view.js
+++ b/wp-includes/js/mce-view.js
@@ -740,7 +740,8 @@ window.wp = window.wp || {};
 				// Create a single-use frame. If the frame is closed,
 				// then detach it from the DOM and remove the reference.
 				this.frame.on( 'close', function() {
-					this.frame.detach();
+					if ( this.frame )
+						this.frame.detach();
 					delete this.frame;
 				}, this );