Make the install actually die when the boot code is too big (which it is).

No idea how long it has been bust for.
Other parts of this makefile are deeply sub-optimal.

sys/arch/atari/stand/bootxx/Makefile.bootxx

@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile.bootxx,v 1.5 2005/12/11 12:17:00 christos Exp $
+#	$NetBSD: Makefile.bootxx,v 1.6 2006/11/21 18:31:44 dsl Exp $
 
 NOMAN=	# defined
 
@@ -43,9 +43,9 @@ LDADD=	${LIBSA}
 
 beforeinstall:
 	@len=`${SIZE} ${PROG} | awk 'NR==2 { print $$1+$$2 }'`;	\
-	 if [ $$len -gt 6656 ]; then				\
+	 if [ "$$len" -gt 6656 ]; then				\
 		${SIZE} ${PROG};					\
-		false;						\
+		exit 1;						\
 	 fi;							\
 	${OBJCOPY} -O binary ${PROG} ${PROG}XX
 	@${TOOL_CAT} ${PROG}XX /dev/zero | dd of=${PROG}X		\