Don't use 'nul' in filenames as windows will belch.

(Caught by importing the tree into mercurial)

tests/lib/libc/regex/Makefile

@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.3 2011/10/10 04:32:41 christos Exp $
+# $NetBSD: Makefile,v 1.4 2011/10/11 23:04:21 dholland Exp $
 
 MKMAN=	no
 
@@ -25,7 +25,6 @@ FILES+=		data/complex.in
 FILES+=		data/error.in
 FILES+=		data/meta.in
 FILES+=		data/nospec.in
-FILES+=		data/nul.in
 FILES+=		data/paren.in
 FILES+=		data/regress.in
 FILES+=		data/repet_bounded.in
@@ -35,6 +34,7 @@ FILES+=		data/startend.in
 FILES+=		data/subexp.in
 FILES+=		data/subtle.in
 FILES+=		data/word_bound.in
+FILES+=		data/zero.in
 
 t_regex.sh: t_regex.awk t_regex.in
 	${TOOL_AWK} -f ${.CURDIR}/t_regex.awk ${.CURDIR}/t_regex.in > ${.TARGET}

tests/lib/libc/regex/t_regex.in

@@ -1,4 +1,4 @@
-# $NetBSD: t_regex.in,v 1.2 2011/01/09 05:44:46 pgoyette Exp $
+# $NetBSD: t_regex.in,v 1.3 2011/10/11 23:04:21 dholland Exp $
 #
 # Copyright (c) 2008 The NetBSD Foundation, Inc.
 # All rights reserved.
@@ -51,7 +51,7 @@ tc:c_comments:Checks matching C comments
 tc:subexp:Checks subexpressions
 tc:startend:Checks STARTEND option
 tc:nospec:Checks NOSPEC option
-tc:nul:Checks NULs
+tc:zero:Checks NULs
 tc:word_bound:Checks word boundaries
 tc:regress:Checks various past problems and suspected problems