2005-04-14  Morten Welinder  <terra@gnome.org>

	* goal-seek.c (goal_seek_initialize): Initalize ->have_root.
	(update_data): Set ->have_root.
	(goal_seek_point, goal_seek_newton, goal_seek_bisection,
	goal_seek_trawl_uniformly, goal_seek_trawl_normally): If we
	already have a root, return success right away.