Tue May 12 00:21:33 1998  Tim Janik  <timj@gtk.org>

        * gtk/gtkwidget.c (gtk_widget_queue_resize): queue the idle_sizer with
        GTK_PRIORITY_INTERNAL - 1, so widgets get first resized and then
        redrawn if that is still neccessary. don't allow queueing of already
        destructed objects.
        (gtk_widget_idle_sizer): proccess the resize queue in a save manner, so
        widgets which are in the queue can be destroyed savely, handle
        requeueing properly.
        (gtk_widget_idle_draw): proccess the redraw queue in a save manner, so
        widgets which are in the queue can be destroyed/unrealized savely.