Name: reduce_hit_point - reduce the hit points in a living

Syntax:
	int reduce_hit_point(int damage)

Description:
	The reduce_hit_point function reduces the hit points in a living. The
	player can't die from this operation for if the hit points are reduced
	below zero they are set to 1.

	The single argument must be a positive integer and states the amount
	if hit points to be reduced.

Return value:
	The function returns an integer containing the new hit points of the
	living.

Examples:
	this_player()->reduce_hit_point(10);

See also: living/heal_self, living/restore_spell_points, living/hit_player