No sources == error again.

tools/host-mkdep/host-mkdep.in

@@ -1,6 +1,6 @@
 #!@BSHELL@ -
 #
-#	$NetBSD: host-mkdep.in,v 1.9 2003/06/10 21:34:02 christos Exp $
+#	$NetBSD: host-mkdep.in,v 1.10 2003/06/11 13:20:38 christos Exp $
 #
 # Copyright (c) 1991, 1993
 #	The Regents of the University of California.  All rights reserved.
@@ -114,8 +114,8 @@ while [ $# -gt 0 ]; do
 done
 
 if [ -z "$SRCS" ]; then
-	echo "$0: Warning no sources specified." 1>&2
-	exit 0
+	echo "$USAGE" 1>&2
+	exit 1
 fi
 
 TMP=/tmp/mkdep$$