Networking: Should fix a few compile errors/warnings reported by Travis

net/udp/udp_callback.c

 /****************************************************************************
  * net/udp/udp_callback.c
  *
- *   Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007-2009, 2015 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -45,6 +45,7 @@
 
 #include <nuttx/net/netconfig.h>
 #include <nuttx/net/netdev.h>
+#include <nuttx/net/netstats.h>
 #include <nuttx/net/udp.h>
 
 #include "devif/devif.h"

net/udp/udp_sendto.c

@@ -378,14 +378,15 @@ ssize_t psock_udp_sendto(FAR struct socket *psock, FAR const void *buf,
                          socklen_t tolen)
 {
   FAR struct udp_conn_s *conn;
-  FAR const struct sockaddr_in *into;
   struct sendto_s state;
   net_lock_t save;
   int ret;
 
+#ifdef CONFIG_NET_ARP_SEND
+  FAR const struct sockaddr_in *into;
+
   /* Make sure that the IP address mapping is in the ARP table */
 
-#ifdef CONFIG_NET_ARP_SEND
   into = (FAR const struct sockaddr_in *)to;
   ret = arp_send(into->sin_addr.s_addr);
   if (ret < 0)