From 62fe88f9af29c05efe08800cd651e4ea3cc741bb Mon Sep 17 00:00:00 2001
From: "Andrey A. Chernov" <ache@FreeBSD.org>
Date: Thu, 23 Oct 1997 02:08:16 +0000
Subject: [PATCH] Add unsigned char cast to ctype macros

---
 gnu/usr.bin/grep/grep.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gnu/usr.bin/grep/grep.c b/gnu/usr.bin/grep/grep.c
index 0353e26a33e..8e93267ccdf 100644
--- a/gnu/usr.bin/grep/grep.c
+++ b/gnu/usr.bin/grep/grep.c
@@ -532,7 +532,7 @@ int isBinaryFile(fd)
 
   /* look for non-printable chars */
   for(i = 0; i < n; i++)
-    if (!isprint(buf[i]) && !isspace(buf[i]))
+    if (!isprint((unsigned char)buf[i]) && !isspace((unsigned char)buf[i]))
       return(1);
 
   /* reset fd to begin of file */