update docs, return current FALSE if x is smaller than the current visible

update docs, return current FALSE if x is smaller than the current visible

Thu Jan 24 23:03:24 2002  Kristian Rietveld  <kris@gtk.org>

        * gtk/gtktreeview.c (gtk_tree_view_get_path_at_pos): update docs,
        return current FALSE if x is smaller than the current visible area,
        not than the requested area, don't correct y coordinate,
        TREE_WINDOW_Y_TO_RBTREE_Y will do that. Fixes #67477.