* clutter/clutter-behaviour-depth.h:
* clutter/clutter-behaviour-depth.c:
(clutter_behaviour_depth_set_bounds),
(clutter_behaviour_depth_get_bounds): Add the depth-start and
depth-end accessors.
* tests/test-depth.c (timeline_completed): Use set_bounds()
instead of g_object_set().
* clutter.symbols: Add clutter_behaviour_depth_set_bounds()
and clutter_behaviour_opacity_get_bounds() to the list of
public symbols.