pktgen: Fix set-but-unused variable.

"iph" in pktgen_output_ipsec() is set but never actually
used.  Kill it off.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index aeeece7..2fa6fee 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -2514,7 +2514,6 @@
 {
 	struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
 	int err = 0;
-	struct iphdr *iph;
 
 	if (!x)
 		return 0;
@@ -2524,7 +2523,6 @@
 		return 0;
 
 	spin_lock(&x->lock);
-	iph = ip_hdr(skb);
 
 	err = x->outer_mode->output(x, skb);
 	if (err)