Lfun:	set_hp - set the amount of hit points in a monster

Synopsis:
	void set_hp(int hp)

Description:
	The set_hp function sets the amount of hit points and the amount
	of maximum hit points in a monster to hp.

Return value:
	none

Examples:
	set_hp(400);

Note:
	Monsters get a default amount of hit points value via set_level
	according to their level!

See also: monster/set_level, living/query_hp, monster/set_sp