$NetBSD$

Adds sys/socket.h.

--- src/lo_types_internal.h.orig	2009-03-06 07:09:26.000000000 +0000
+++ src/lo_types_internal.h
@@ -29,6 +29,7 @@ typedef __int32 int32_t;
 #endif
 
 #include <pthread.h>
+#include <sys/socket.h>
 
 #include "lo/lo_osc_types.h"
 
