Name: move - override exits in a room

Syntax:
	#include <room2.h>
	int move()

Description:
	The move function is called through an add_action for each direction
	(set with set_exits) that is accessible in the room. It can be over-
	ridden to show special actions when a player wants to leave the room.
	
Return value:
	Should always return 1

Examples:
	A player shouldn't leave the room to the north, when a troll is
	present:

	move() {
		if (query_verb()=="north" && present("troll")) {
			write("The troll bars your way!\n");
			say("The troll bars "+this_player()->query_name()+
			  "'s way north.\n");
			return 1;
		}
		return ::move();
	}

See also: room/set_exits