NAME
       RefreshPageGadget -- Refresh gadget in a paged layout

   SYNOPSIS
       RefreshPageGadget(gad, page, win, req)
                         A0     A1       A2   A3

       void RefreshPageGadget(struct gadget *, object *,
               struct window *, struct requester *)

   FUNCTION
       Like RefreshGList(gad,win,req,1), but passes a NULL window and
       requester pointer if the gadget is not on the currently visible
       page.