make access specifiers for the virtual functions match their access in the base class (patch 1400131)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@37393 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/treebook.h

@@ -138,6 +138,9 @@ public:
     virtual bool DeleteAllPages();
 
 protected:
+    // Implementation of a page removal. See DeletPage for comments.
+    wxTreebookPage *DoRemovePage(size_t pos);
+
     // This subclass of wxBookCtrlBase accepts NULL page pointers (empty pages)
     virtual bool AllowNullPage() const { return true; }
 
@@ -180,9 +183,6 @@ private:
                          bool bSelect = false,
                          int imageId = wxNOT_FOUND);
 
-    // Implementation of a page removal. See DeletPage for comments.
-    wxTreebookPage *DoRemovePage(size_t pos);
-
     // Sets selection in the tree control and updates the page being shown.
     int DoSetSelection(size_t pos);