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/cocoa/pen.h

@@ -28,7 +28,7 @@ public:
     wxPen();
     wxPen(const wxColour& col, int width = 1, int style = wxSOLID);
     wxPen(const wxBitmap& stipple, int width);
-    ~wxPen();
+    virtual ~wxPen();
 
     // wxObjectRefData
     wxObjectRefData *CreateRefData() const;