nsiproxy: Include sys/socket.h.

This addresses

  invalid use of undefined type 'struct sock addr'

and AF_INET being unknown when building on FreeBSD 11.x.

Signed-off-by: Gerald Pfeifer <gerald@pfeifer.com>
Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>

dlls/nsiproxy.sys/ip.c

@@ -21,6 +21,10 @@
 #include "config.h"
 #include <stdarg.h>
 
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+
 #ifdef HAVE_NETINET_IN_H
 #include <netinet/in.h>
 #endif