Header change for smooth Aqua buttons in wxTreeCtrl.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@13053 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/generic/treectlg.h

@@ -382,6 +382,8 @@ protected:
 
     wxTimer             *m_renameTimer;
     wxString             m_renameRes;
+    
+    wxBitmap            *m_arrowRight,*m_arrowDown;
 
     // the common part of all ctors
     void Init();