NAME
	RemTail -- remove the tail node from a list

   SYNOPSIS
	node = RemTail(list)
	D0	       A0

	struct Node *RemTail(struct List *);

   FUNCTION
	Remove the last node from a list, and return a pointer to it. If
	the list is empty, return zero. Assembly programmers may prefer to
	use the REMTAIL macro from "exec/lists.i".

   WARNING
	This function does not arbitrate for access to the list.  The
	calling task must be the owner of the involved list.

   INPUTS
	list - a pointer to the target list header

   RESULT
	node - the node removed or zero when empty list

   SEE ALSO
	AddHead(), AddTail(), Enqueue(), Insert(), Remove(), RemHead()