2003-03-17 Andrew Cagney <cagney@redhat.com>

	* frame.c (get_frame_id): If the frame's ID isn't valid, get it.
	(get_prev_frame): Validate THIS frame's ID before trying to unwind
	to prev frame.  Don't compute PREV's frame's ID.
	(get_frame_base): Force the update of frame ID before returning
	the frame.
	* frame.h (struct frame_info): Add "id_p".