ipv4: Remove rt->rt_dst reference from ip_forward_options().

At this point iph->daddr equals what rt->rt_dst would hold.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/ip_options.c

@@ -567,7 +567,7 @@ void ip_forward_options(struct sk_buff *skb)
 		     ) {
 			if (srrptr + 3 > srrspace)
 				break;
-			if (memcmp(&rt->rt_dst, &optptr[srrptr-1], 4) == 0)
+			if (memcmp(&ip_hdr(skb)->daddr, &optptr[srrptr-1], 4) == 0)
 				break;
 		}
 		if (srrptr + 3 <= srrspace) {