ipv4: Kill spurious opt->srr check in ip_options_rcv_srr().

All call sites conditionalize the call to ip_options_rcv_srr()
with a check of opt->srr, so no need to check it again there.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/ip_options.c

@@ -601,7 +601,7 @@ int ip_options_rcv_srr(struct sk_buff *skb)
 	unsigned long orefdst;
 	int err;
 
-	if (!opt->srr || !rt)
+	if (!rt)
 		return 0;
 
 	if (skb->pkt_type != PACKET_HOST)