[NET]: Annotate callers of the reset of checksum.h stuff.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index da6683f..6e8c15b 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1294,7 +1294,7 @@
 
 			end = start + list->len;
 			if ((copy = end - offset) > 0) {
-				unsigned int csum2;
+				__wsum csum2;
 				if (copy > len)
 					copy = len;
 				csum2 = skb_checksum(list, offset - start,