* Fix ip6mr build break (undefined csum_ipv6_magic symbol)

Signed-off-by : Sachin Sant (sachinp@in.ibm.com)
---

diff -Naurp a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
--- a/net/ipv6/ip6mr.c	2009-01-31 13:58:00.000000000 +0530
+++ b/net/ipv6/ip6mr.c	2009-01-31 13:59:16.000000000 +0530
@@ -43,6 +43,7 @@
 #include <net/netlink.h>
 
 #include <net/ipv6.h>
+#include <net/ip6_checksum.h>
 #include <net/ip6_route.h>
 #include <linux/mroute6.h>
 #include <linux/pim.h>