Sat Aug 15 03:19:30 1998  John Ellis  <johne@bellatlantic.net>

        * gtk/gtkctree.[ch] (gtk_ctree_set_drag_compare_func): New function
        to set a callback to test if a node in drag can be dropped onto
        it's currrent location.
        * gtk/gtkctree.c (set_mouse_cursor),(check_cursor): New functions
        to change the pointer when a drag destination is not allowed.