net-sched: change tcf_destroy_chain() to clear start of filter list

Pass double tcf_proto pointers to tcf_destroy_chain() to make it
clear the start of the filter list for more consistency.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_ingress.c b/net/sched/sch_ingress.c
index 274b1dd..956c80a 100644
--- a/net/sched/sch_ingress.c
+++ b/net/sched/sch_ingress.c
@@ -104,7 +104,7 @@
 {
 	struct ingress_qdisc_data *p = qdisc_priv(sch);
 
-	tcf_destroy_chain(p->filter_list);
+	tcf_destroy_chain(&p->filter_list);
 }
 
 static int ingress_dump(struct Qdisc *sch, struct sk_buff *skb)