forward port from 2.8

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@49784 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/mac/carbon/menuitem.h

@@ -54,6 +54,8 @@ public:
     void SetRadioGroupEnd(int end);
 
 private:
+    void DoUpdateItemBitmap( WXHMENU menu, wxUint16 index) ;
+
     void UncheckRadio() ;
 
     // the positions of the first and last items of the radio group this item