From 56cf98937c95ed6aee58b464aa389ee3a90c9413 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Benoi=CC=82t=20Pin?= <pin@cri.ensmp.fr>
Date: Fri, 10 Oct 2014 10:54:04 +0200
Subject: [PATCH] bugfix.

---
 skins/photo_lightbox_viewer.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/skins/photo_lightbox_viewer.js b/skins/photo_lightbox_viewer.js
index 97c7f79..3438151 100644
--- a/skins/photo_lightbox_viewer.js
+++ b/skins/photo_lightbox_viewer.js
@@ -482,10 +482,10 @@ Lightbox.prototype.onDragStart = function(evt) {
 
 Lightbox.prototype.onDragOver = function(evt) {
 	var target = getTargetedObject(evt);
-	if (!target) {return;}
-	while(target.className !== 'slide') {
+	while(target && target.className !== 'slide') {
 		target = target.parentNode;
 	}
+	if (!target) {return;}
 	target = target.parentNode;
 	if (target !== this.dragged) {
 		target.classList.add('dragover');
-- 
2.20.1