$NetBSD: patch-ab,v 1.18 2006/02/20 17:56:36 joerg Exp $

--- libtiff/tiffio.h.orig	2006-02-20 17:43:42.000000000 +0000
+++ libtiff/tiffio.h
@@ -30,6 +30,10 @@
 /*
  * TIFF I/O Library Definitions.
  */
+
+/* NULL */
+#include <stddef.h>
+
 #include "tiff.h"
 #include "tiffvers.h"
 
@@ -97,10 +101,6 @@ typedef	HFILE thandle_t;	/* client data 
 typedef	void* thandle_t;	/* client data handle */
 #endif /* USE_WIN32_FILEIO */
 
-#ifndef NULL
-# define NULL	(void *)0
-#endif
-
 /*
  * Flags to pass to TIFFPrintDirectory to control
  * printing of data structures that are potentially