From 47bc90320f03d4b4e990a3ddd8411e4e330d7d1e Mon Sep 17 00:00:00 2001
From: bapt <bapt@FreeBSD.org>
Date: Sat, 30 Apr 2016 14:48:30 +0000
Subject: [PATCH] When checking for binary file, check if ch is not EOF only ch
 actually got a value assigned

Reported by:	pfg
---
 usr.bin/sdiff/sdiff.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/usr.bin/sdiff/sdiff.c b/usr.bin/sdiff/sdiff.c
index 0c822aae738b..3a97e1041562 100644
--- a/usr.bin/sdiff/sdiff.c
+++ b/usr.bin/sdiff/sdiff.c
@@ -514,12 +514,14 @@ istextfile(FILE *f)
 	if (f == NULL)
 		return (1);
 	rewind(f);
-	for (i = 0; i <= MAX_CHECK || ch != EOF; i++) {
+	for (i = 0; i <= MAX_CHECK; i++) {
 		ch = fgetc(f);
 		if (ch == '\0') {
 			rewind(f);
 			return (0);
 		}
+		if (ch == EOF)
+			break;
 	}
 	rewind(f);
 	return (1);