Lfun:	make_a_chat - make a monster talk during combat once

Synopsis:
	void make_a_chat()

Description:
	The make_a_chat call tells a monster to make a combat chat once. It
	is normally called from within the monster's heart beat rountine 
	according to the attack chat chance, set with load_a_chat.

	You shouldn't call this function if you haven't set up a attack chat
	array using load_a_chat.

Return value:
	none

Examples:
	make_a_chat();

See also: monster/load_a_chat, monster/query_a_chat, monster/make_chat