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/palmos/help.h

@@ -23,8 +23,8 @@ class WXDLLEXPORT wxPalmHelpController: public wxHelpControllerBase
     DECLARE_CLASS(wxPalmHelpController)
 
 public:
-    wxPalmHelpController() {};
-    ~wxPalmHelpController() {};
+    wxPalmHelpController() {}
+    virtual ~wxPalmHelpController() {}
 
     // Must call this to set the filename
     virtual bool Initialize(const wxString& file);