SYNOPSIS
	valid_query_snoop(object ob)

DESCRIPTION
	Should return 1 if previous_object() (the one that called the
	efun query_snoop()) is allowed to query wether ob is being
	snooped, 0 if not.

	The master object is always allowed to use query_snoop().

SEE ALSO
	valid_snoop(M), query_snoop(E), snoop(E)