Unicode build fix.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@38941 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/widgets/widgets.cpp

@@ -448,7 +448,7 @@ void WidgetsFrame::InitBook()
         menuPages->AppendRadioItem
                    (
                     Widgets_GoToPage + nPage,
-                    wxString::Format("%s\tF%u",
+                    wxString::Format(wxT("%s\tF%u"),
                                      info->GetLabel().c_str(), nPage + 1)
                    );
     }