===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/rcs/diff.c,v
retrieving revision 1.39
retrieving revision 1.40
diff -u -r1.39 -r1.40
--- src/usr.bin/rcs/diff.c	2016/10/16 13:35:51	1.39
+++ src/usr.bin/rcs/diff.c	2019/06/28 13:35:03	1.40
@@ -1,4 +1,4 @@
-/*	$OpenBSD: diff.c,v 1.39 2016/10/16 13:35:51 okan Exp $	*/
+/*	$OpenBSD: diff.c,v 1.40 2019/06/28 13:35:03 deraadt Exp $	*/
 /*
  * Copyright (C) Caldera International Inc.  2001-2002.
  * All rights reserved.
@@ -327,12 +327,12 @@
 		goto closem;
 	}
 
-	if (fstat(fileno(f1), &stb1) < 0) {
+	if (fstat(fileno(f1), &stb1) == -1) {
 		warn("%s", file1);
 		goto closem;
 	}
 
-	if (fstat(fileno(f2), &stb2) < 0) {
+	if (fstat(fileno(f2), &stb2) == -1) {
 		warn("%s", file2);
 		goto closem;
 	}
@@ -849,7 +849,7 @@
 	ssize_t nr;
 
 	line = xmalloc(rlen + 1);
-	if ((nr = pread(fd, line, rlen, off)) < 0)
+	if ((nr = pread(fd, line, rlen, off)) == -1)
 		err(D_ERROR, "preadline");
 	line[nr] = '\0';
 	return (line);