add check for y > tree_view->priv->height (fixes #76974)

add check for y > tree_view->priv->height (fixes #76974)

Mon Apr  1 22:20:24 2002  Kristian Rietveld  <kris@gtk.org>

        * gtk/gtktreeview.c (gtk_tree_view_move_cursor_page_up_down): add
        check for y > tree_view->priv->height (fixes #76974)

Mon Apr  1 22:19:39 2002  Kristian Rietveld  <kris@gtk.org>

        * gtk/gtktreemodelsort.c (gtk_tree_model_sort_sort_level): get
        the stamp changes right this time

Mon Apr  1 22:13:24 2002  Kristian Rietveld  <kris@gtk.org>

        * gtk/gtktreemodel.c (gtk_tree_row_reference_free): only
        disconnect the ref callbacks when model == proxy (Thanks go to
        Manuel Clos Crespo for the remote debugging)