[src/trunk]: src/usr.bin/xlint/lint1 -0 is not unary overflow.

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/46a9c27f4919
branches:  trunk
changeset: 778297:46a9c27f4919
user:      christos <christos%NetBSD.org@localhost>
date:      Wed Mar 21 14:17:22 2012 +0000

description:
-0 is not unary overflow.

diffstat:

 usr.bin/xlint/lint1/tree.c |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (27 lines):

diff -r 8c425db1367f -r 46a9c27f4919 usr.bin/xlint/lint1/tree.c
--- a/usr.bin/xlint/lint1/tree.c        Wed Mar 21 14:11:24 2012 +0000
+++ b/usr.bin/xlint/lint1/tree.c        Wed Mar 21 14:17:22 2012 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: tree.c,v 1.68 2011/02/05 17:14:14 christos Exp $       */
+/*     $NetBSD: tree.c,v 1.69 2012/03/21 14:17:22 christos Exp $       */
 
 /*
  * Copyright (c) 1994, 1995 Jochen Pohl
@@ -37,7 +37,7 @@
 
 #include <sys/cdefs.h>
 #if defined(__RCSID) && !defined(lint)
-__RCSID("$NetBSD: tree.c,v 1.68 2011/02/05 17:14:14 christos Exp $");
+__RCSID("$NetBSD: tree.c,v 1.69 2012/03/21 14:17:22 christos Exp $");
 #endif
 
 #include <stdlib.h>
@@ -2676,7 +2676,7 @@
                break;
        case UMINUS:
                q = -sl;
-               if (msb(q, t, -1) == msb(sl, t, -1))
+               if (sl != 0 && msb(q, t, -1) == msb(sl, t, -1))
                        ovfl = 1;
                break;
        case COMPL: