fix return type of skb_checksum_complete()

It returns __sum16, not unsigned int
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/skbuff.h

@@ -1639,7 +1639,7 @@ static inline int skb_csum_unnecessary(const struct sk_buff *skb)
  *	if skb->ip_summed is CHECKSUM_UNNECESSARY which indicates that the
  *	hardware has already verified the correctness of the checksum.
  */
-static inline unsigned int skb_checksum_complete(struct sk_buff *skb)
+static inline __sum16 skb_checksum_complete(struct sk_buff *skb)
 {
 	return skb_csum_unnecessary(skb) ?
 	       0 : __skb_checksum_complete(skb);