$NetBSD: patch-configure,v 1.1 2012/07/29 21:44:13 gsutre Exp $

Strengthen the test for working -nostdinc -isystem.  Otherwise,
configure believes that -nostdinc -isystem works with gcc44, which
makes the build fail afterwards (for a file including stddef.h).

--- configure.orig	2012-06-26 11:59:16.000000000 +0000
+++ configure
@@ -21169,6 +21169,7 @@ else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <stdarg.h>
+#include <stddef.h>
 int va_arg_func (int fixed, va_list args);
 int
 main (void)