SYNOPSIS
	int query_allow_shadow(object victim)

DESCRIPTION
	Return 1 if previous_object() is allowed to use efun shadow()
	on object victim, 0 if it is not.

	The function should deny shadowing on all root objects, else
	it might query the victim for clearance. Most installations
	seem to use victim->query_prevent_shadow(previous_object()) to
	check if the victim denies being shadowed.

SEE ALSO
	shadow(E)