Warning fixes found under hardest mode of OpenWatcom. Seems clean in Borland, MinGW and DMC.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@29683 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/checklst/checklst.cpp

@@ -48,7 +48,7 @@ public:
     // ctor & dtor
     CheckListBoxFrame(wxFrame *frame, const wxChar *title,
                       int x, int y, int w, int h);
-    virtual ~CheckListBoxFrame();
+    virtual ~CheckListBoxFrame(){};
 
     // notifications
     void OnQuit(wxCommandEvent& event);
@@ -243,10 +243,6 @@ void CheckListBoxFrame::CreateCheckListbox(long flags)
     m_pListBox->Select(3);
 }
 
-CheckListBoxFrame::~CheckListBoxFrame()
-{
-}
-
 void CheckListBoxFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 {
     Close(true);