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/richtext/richtextstyles.h

@@ -192,9 +192,6 @@ public:
         const wxSize& size = wxDefaultSize, long style = 0);
     ~wxRichTextStyleListBox();
 
-    /// Returns the HTML for this item
-    virtual wxString OnGetItem(size_t n) const;
-
     /// Creates a suitable HTML fragment for a definition
     wxString CreateHTML(wxRichTextStyleDefinition* def) const;
 
@@ -226,6 +223,10 @@ public:
     // Convert units in tends of a millimetre to device units
     int ConvertTenthsMMToPixels(wxDC& dc, int units) const;
 
+protected:
+    /// Returns the HTML for this item
+    virtual wxString OnGetItem(size_t n) const;
+
 private:
 
     wxRichTextStyleSheet*   m_styleSheet;