падение при UNDO после удаления таблицы

git-svn-id: svn://192.168.3.15/activex/AVS/Sources/TeamlabOffice/trunk/OfficeWeb@68287 954022d7-b5bf-4e40-9824-e11837661b57

Excel/model/Workbook.js

@@ -2578,7 +2578,7 @@ Workbook.prototype.editDefinesNames = function ( oldName, newName, bUndo ) {
 
     var newN = newName.Name.toLowerCase(), retRes = null, rename = false, nSE, se;
 
-    if ( !rx_defName.test( newN ) || newName.Ref.length == 0 ) {
+    if ( !rx_defName.test( newN ) || !newName.Ref || newName.Ref.length == 0  ) {
         return retRes;
     }