DialogEd compiles and works more or less

wxList::Nth() is allowd to just return NULL for
    out-of-bounds index


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1177 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

utils/dialoged/src/reseditr.cpp

@@ -873,11 +873,7 @@ void wxResourceManager::AddItemsRecursively(long parent, wxItemResource *resourc
   else
     imageId = 3;
   
-  long id = m_editorResourceTree->InsertItem(parent, theString
-#ifdef __WXMSW__
-     , imageId
-#endif
-   );
+  long id = m_editorResourceTree->AppendItem(parent, theString, imageId );
 
   m_editorResourceTree->SetItemData(id, new wxResourceTreeData(resource));