FILE
	/usr/common/sys/channeld.c

NAME
	sub_data_level - return the extra subscription data for a channel
	subscription

PROTOTYPE
	int sub_data_level(object user, int channel)

CALLED BY
	System, Common, Game

DESCRIPTION
	This is used only for specific channels that specify extra
	subscription data.  This extra data is currently only used for
	errors and log messages as a way to subscribe to only certain
	severities of either or both.

RETURN VALUE
	An integer, the extra subscription data.  If -1 is returned,
	the request could not be completed.

ERRORS
	Normally none

SEE ALSO
	get_channel_by_name, string_to_channel, subscribe_user