Name: is_enemy - check if another living is an enemy of a living

Synopsis:
	status is_enemy(object enemy)

Description:
	The is_enemy-call returns if another living is an enemy. It also
	checks if it is a REAL enemy, that means it is either fighting or
	hunted.

Return value:
	1 if the other living is an enemy,
	0 if not.

Examples:
	if (this_player()->is_enemy(this_object()))
	  say(query_name()+" asks: Why are you killing me?\n");

See also: living/query_enemies, living/stop_fight, living/attack_object, living/query_attack, living/show_enemies, living/attacked_by