NAME
	next_inventory - get the next object in an inventory

SYNOPSIS
	object next_inventory(object ob)

DESCRIPTION
	Get next object in the same inventory as "ob".

NOTA BENE
	If the object 'ob' is moved by move_object(), then next_inventory()
	will return an object from the new inventory.

SEE ALSO
	first_inventory, all_inventory, deep_inventory