Patch [ 584078 ] Misc samples fixes from Dimitri Schoolwerth

Addresses:
  printf-format warinigs
  indentation/style
  unused variable warnings
  used wxID_ABOUT for about menu entry
  removed references to "minimal sample" in other samples
  some other misc warinigs


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@16339 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/widgets/radiobox.cpp

@@ -454,4 +454,4 @@ void RadioWidgetsPage::OnUpdateUIReset(wxUpdateUIEvent& event)
     event.Enable(enable);
 }
 
-#endif
+#endif