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/tex2rtf/src/htmlutil.cpp

@@ -114,7 +114,7 @@ class TexNextPage: public wxObject
     label = copystring(theLabel);
     filename = copystring(theFile);
   }
-  ~TexNextPage(void)
+  virtual ~TexNextPage(void)
   {
     delete[] label;
     delete[] filename;