net: cleanup unsigned to unsigned int

Use of "unsigned int" is preferred to bare "unsigned" in net tree.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index f6210d6..7fba35a 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -515,7 +515,7 @@
 		u8 nexthdr = ipv6_hdr(skb)->nexthdr;
 
 		while (off <= opt->lastopt) {
-			unsigned len;
+			unsigned int len;
 			u8 *ptr = nh + off;
 
 			switch (nexthdr) {