FILE
	/usr/common/sys/zoned.c

NAME
	num_zones - returns the number of zones registered

PROTOTYPE
	int num_zones(void)

CALLED BY
	System, Common, Game

DESCRIPTION
	Returns the number of zones.

RETURN VALUE
	Number of zones, or -1 if query failed.

ERRORS
	Normally none.

SEE ALSO
	get_name_for_zone, add_new_zone