use wxOVERRIDE

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76220 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/combobox.h

@@ -33,7 +33,7 @@ class WXDLLIMPEXP_CORE wxComboBoxBase : public wxItemContainer,
 {
 public:
     // override these methods to disambiguate between two base classes versions
-    virtual void Clear()
+    virtual void Clear() wxOVERRIDE
     {
         wxTextEntry::Clear();
         wxItemContainer::Clear();