boost::shared_ptr<T> and Gtk::TreeModelColumn<T>

[Paul Davis <paul linuxaudiosystems com>]

any opinions on the best way to have:

	Gtk::TreeModelColumn<boost::shared_ptr<T> > 

at the moment, g++ appears to pick the void* partial specialization of
TreeModelColumn, which leads to problems later (glib complains that the
object is not actually a G_TYPE_POINTER etc). i have considered
implementing another partial specialization, but I am not sure it will
solve the issue. any thoughts?

--p