From 7caa9f5f505f97565cdac3f82a0b7d3d6df80a46 Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Thu, 5 Nov 2015 15:40:10 +0100
Subject: [PATCH] Fix error on dragging when search in treelist is active

---
 program/js/treelist.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/program/js/treelist.js b/program/js/treelist.js
index 9194d7b56..bcbfeebae 100644
--- a/program/js/treelist.js
+++ b/program/js/treelist.js
@@ -943,7 +943,7 @@ function rcube_treelist_widget(node, p)
     for (var id in indexbyid) {
       li = id2dom(id);
       item = li.children().first().get(0);
-      if (height = item.offsetHeight) {
+      if (item && (height = item.offsetHeight)) {
         pos = $(item).offset();
         pos.top += list_scroll_top;
         item_coords[id] = {