$NetBSD: patch-ac,v 1.1.1.1 2007/02/19 21:19:14 dsainty Exp $

Defining _XOPEN_SOURCE breaks the build under NetBSD.

--- libsupport/csvfile.cpp.orig	2003-06-20 11:37:47.000000000 +1200
+++ libsupport/csvfile.cpp	2007-02-19 21:19:46.000000000 +1300
@@ -1,5 +1,3 @@
-#define _XOPEN_SOURCE
-
 #include <iostream>
 #include <fstream>
 #include <sstream>
