[DECNET]: Fix build regressions.

Spotted by Arnaldo.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/decnet/dn_table.c b/net/decnet/dn_table.c
index e74b744..9ce58c2 100644
--- a/net/decnet/dn_table.c
+++ b/net/decnet/dn_table.c
@@ -265,7 +265,7 @@
 
 static inline size_t dn_fib_nlmsg_size(struct dn_fib_info *fi)
 {
-	size_t payload = NLMSG_ALIGN(struct rtmsg)
+	size_t payload = NLMSG_ALIGN(sizeof(struct rtmsg))
 			 + nla_total_size(4) /* RTA_TABLE */
 			 + nla_total_size(2) /* RTA_DST */
 			 + nla_total_size(4); /* RTA_PRIORITY */
@@ -361,7 +361,7 @@
         u32 pid = req ? req->pid : 0;
 	int err = -ENOBUFS;
 
-        skb = nlmsg_new(dn_fib_nlmsg_size(DN_FIB_INFO(f), GFP_KERNEL));
+        skb = nlmsg_new(dn_fib_nlmsg_size(DN_FIB_INFO(f)), GFP_KERNEL);
         if (skb == NULL)
 		goto errout;