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BUGFIX #6089 Avoid javascript error when "Allow drag & drop reorderin…

…g" enabled, and attempt to drag a file from one folder to another is performed (from r111932)

git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@112945 467b73ca-7a2a-4603-9d3b-597d59a354a9
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1 parent be40e11 commit c2989908c84e960b8ff79f1af32a93fc03942d10 @sminnee sminnee committed Oct 19, 2010
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  1. +2 −0 javascript/tree/tree.js
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@@ -143,6 +143,8 @@ Tree.prototype = {
* If 'before' is specified, then it will be inserted before that.
*/
appendTreeNode : function(child, before) {
+ if(!child) return;
+
// Remove from the old parent node - this will ensure that the classes of the old tree
// item are updated accordingly
if(child && child.parentTreeNode) {

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