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

utils/wxOLE/samples/servlet/servlet.cpp

@@ -65,7 +65,7 @@ class MyApp : public wxApp
 public:
 
     MyApp();
-    ~MyApp();
+    virtual ~MyApp();
 
     virtual bool OnInit();