No changes, just some cleanup in wxGenericDirCtrl code.

Use GetItemData() helper to only write a cast to wxDirItemData in this
function instead of repeating it many times.

See #14790.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72841 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/generic/dirctrlg.h

@@ -192,6 +192,7 @@ protected:
 
 private:
     void PopulateNode(wxTreeItemId node);
+    wxDirItemData* GetItemData(wxTreeItemId itemId);
 
     bool            m_showHidden;
     wxTreeItemId    m_rootId;