cocoa needs a special implementation for read-only combo box

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74175 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/osx/combobox.h

@@ -104,10 +104,10 @@ class WXDLLIMPEXP_CORE wxComboBox :
 
     virtual unsigned int GetCount() const;
 
+    virtual void SetValue(const wxString& value);
 // these methods are provided by wxTextEntry for the native impl.
 #if wxOSX_USE_CARBON
     // Text field functions
-    virtual void SetValue(const wxString& value);
     virtual wxString GetValue() const;
     virtual void WriteText(const wxString& text);