[PKT_SCHED]: Delay scheduler enqueue always succeeds.

If underlying fifo enqueue fails, return the status not 0.
Same patch should apply to both 2.6 and 2.4
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@redhat.com>

net/sched/sch_delay.c

@@ -69,7 +69,7 @@ static int dly_enqueue(struct sk_buff *skb, struct Qdisc *sch)
 		sch->stats.bytes += skb->len;
 		sch->stats.packets++;
 	}
-	return 0;
+	return ret;
 }
 
 /* Requeue packets but don't change time stamp */