[sigc] is it a bug?

[Paul Pogonyshev <pogonyshev gmx net>]

Does the example below show a bug?  It compiles without errors here.
(sigc++ 2.0.10, Gtkmm 2.4.10, GCC 3.3 and 4.0.)

Paul


#include <sigc++/sigc++.h>
#include <glibmm/refptr.h>
#include <gtkmm/notebook.h>


int
main (int argc, char** argv)
{
  Gtk::Notebook*  notebook = new Gtk::Notebook ();

  sigc::slot <void, const Glib::RefPtr <Gtk::Notebook>&>  slot
    = sigc::mem_fun (notebook, &Gtk::Notebook::set_current_page);

  return 0;
}