From 374f9556d14928903111d11c4f92eb33ece2f9c0 Mon Sep 17 00:00:00 2001
From: jekkos-t520 <jeroen.peelaerts@gmail.com>
Date: Thu, 5 Feb 2015 17:25:35 +0100
Subject: [PATCH] Don't try to preview images when there are none

---
 js/imgpreview.full.jquery.js | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/js/imgpreview.full.jquery.js b/js/imgpreview.full.jquery.js
index c2f370342..eb5fdec1c 100644
--- a/js/imgpreview.full.jquery.js
+++ b/js/imgpreview.full.jquery.js
@@ -55,17 +55,21 @@
         
         // Re-usable means to add prefix (from setting):
         function addPrefix(src) {
-            return src.replace(/(\/?)([^\/]+)$/,'$1' + s.thumbPrefix + '$2');
+            return src && src.replace(/(\/?)([^\/]+)$/,'$1' + s.thumbPrefix + '$2');
         }
         
         if (s.preloadImages) {
             (function(i){
                 var tempIMG = new Image(),
                     callee = arguments.callee;
-                tempIMG.src = addPrefix($($collection[i]).attr(s.srcAttr));
-                tempIMG.onload = function(){
-                    $collection[i + 1] && callee(i + 1);
-                };
+                var src = $($collection[i]).attr(s.srcAttr)
+                if (src)
+                {
+                	tempIMG.src = addPrefix(src);
+                    tempIMG.onload = function(){
+                        $collection[i + 1] && callee(i + 1);
+                    };
+                }
             })(0);
         }