From 979bf49c330e1c6d3bd899eb20f84ed552d57c1b Mon Sep 17 00:00:00 2001
From: Juwan Yoo <vhain6512@gmail.com>
Date: Tue, 25 Jun 2013 11:14:48 +0900
Subject: [PATCH] Bug fix: "width is null or not an object" from IE8
 occasionally. (undefined is null or not an object with jquery 1.9.1. works
 fine with 1.10.1)

---
 jquery.backgroundSize.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/jquery.backgroundSize.js b/jquery.backgroundSize.js
index 7417632..4baa6ed 100644
--- a/jquery.backgroundSize.js
+++ b/jquery.backgroundSize.js
@@ -178,8 +178,12 @@ $.refreshBackground = function( elem ) {
 		imgDim = $.data( elem, "bgsImgDim" ),
 		$img = $( $.data( elem, "bgsImg" ) ),
 		pos = $.data( elem, "bgsPos" ),
-		prevConstrain = $.data( elem, "bgsConstrain" ),
-		currConstrain,
+		prevConstrain = $.data( elem, "bgsConstrain" );
+
+	if (!elemDim || !imgDim)
+		return;
+
+	var currConstrain,
 		elemRatio = elemDim.width / elemDim.height,
 		imgRatio = imgDim.width / imgDim.height,
 		delta;