[IPV6]: Fix thinko in ipv6_rthdr_rcv() changes.

Signed-off-by: NYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv6/exthdrs.c

@@ -400,6 +400,7 @@ static int ipv6_rthdr_rcv(struct sk_buff **skbp)
 
 	switch (hdr->type) {
 #ifdef CONFIG_IPV6_MIP6
+	case IPV6_SRCRT_TYPE_2:
 		break;
 #endif
 	case IPV6_SRCRT_TYPE_0: