[SK_BUFF]: Some more simple skb_reset_network_header conversions

This time of the type:

 skb->nh.iph = (struct iphdr *)skb->data;

That is completely equivalent to:

 skb->nh.raw = skb->data;

Wonder why people love casts... :-)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sctp/input.c b/net/sctp/input.c
index 71db668..2b0863a 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -528,7 +528,7 @@
 	/* Fix up skb to look at the embedded net header. */
 	saveip = skb->nh.raw;
 	savesctp  = skb->h.raw;
-	skb->nh.iph = iph;
+	skb_reset_network_header(skb);
 	skb->h.raw = (char *)sh;
 	sk = sctp_err_lookup(AF_INET, skb, sh, &asoc, &transport);
 	/* Put back, the original pointers. */