Set vtable entry for default implementations (atk_text_get_range_extents):

Set vtable entry for default implementations (atk_text_get_range_extents):

2003-01-21  Padraig O'Briain  <padraig.obriain@sun.com>

	* atk/atktext.c
	(atk_text_base_init): Set vtable entry for default implementations
	(atk_text_get_range_extents): Omit calling default implementation
	(atk_text_get_bounded_ranges): Omit calling default implementation

	* atk/atkcomponent.c
	(atk_component_base_init): New function to set vtable entry for
	default implementations
	(atk_component_ref_accessible_at_point): Omit calling default
	implementation
	(atk_component_contains): Omit calling default implementation
	(atk_component_get_position): Omit calling default implementation
	(atk_component_get_size): Omit calling default implementation