Don't try to chmod ptys if we have none.

etc/rc.d/ttys

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# $NetBSD: ttys,v 1.5 2004/08/13 18:08:03 mycroft Exp $
+# $NetBSD: ttys,v 1.6 2004/11/10 05:04:51 christos Exp $
 #
 
 # PROVIDE: tty
@@ -25,8 +25,9 @@ ttyflags_start()
 	#	XXX:	there may be more ptys than this; maybe use
 	#		sysctl kern.maxptys to find out how many?
 	#
-	chmod 666 /dev/tty[p-uw-zP-T][0-9a-zA-Z]
-
+	if [ -c /dev/ttyp0 ]; then
+		chmod 666 /dev/tty[p-uw-zP-T][0-9a-zA-Z]
+	fi
 	#	only change ttyv* if ttyv0 is not reserved by a console.
 	#
 	if [ -c /dev/ttyv1 ]; then