mark all dtors which are virtual because base class dtor is virtual explicitly virtual themselves

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41020 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/motif/icon.h

@@ -38,7 +38,7 @@ public:
         LoadFile(loc.GetFileName(), wxBITMAP_TYPE_ANY);
     }
 
-    ~wxIcon();
+    virtual ~wxIcon();
 
     bool LoadFile(const wxString& name, wxBitmapType type,
                   int desiredWidth, int desiredHeight = -1);