[IPV4]: Fix lost routes in fn_hash netlink dumps.

Spotted by itkes@fat.imed.msu.ru, the fn_hash_dump_bucket() main
loop does not increment 'i' properly, and thus routes will not
be listed, when the test 'i < s_i' passes.

The bug was added when the code was converted over to
hlist_for_each_entry() by your's truly.
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/fib_hash.c

@@ -684,7 +684,7 @@ fn_hash_dump_bucket(struct sk_buff *skb, struct netlink_callback *cb,
 
 		list_for_each_entry(fa, &f->fn_alias, fa_list) {
 			if (i < s_i)
-				continue;
+				goto next;
 
 			if (fib_dump_info(skb, NETLINK_CB(cb->skb).pid,
 					  cb->nlh->nlmsg_seq,
@@ -699,7 +699,7 @@ fn_hash_dump_bucket(struct sk_buff *skb, struct netlink_callback *cb,
 				cb->args[3] = i;
 				return -1;
 			}
-
+		next:
 			i++;
 		}
 	}