From 00dfbaad88a69ed8294d6039bf5f7d722f72bf39 Mon Sep 17 00:00:00 2001
From: Pauli <paul.dale@oracle.com>
Date: Mon, 21 Aug 2017 07:36:23 +1000
Subject: Fix ctype arguments.

Cast arguments to the various ctype functions to unsigned char to match their
documentation.

Reviewed-by: Andy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4203)
---
 apps/opt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'apps/opt.c')

diff --git a/apps/opt.c b/apps/opt.c
index 72d0c535fa..40d6a279b3 100644
--- a/apps/opt.c
+++ b/apps/opt.c
@@ -61,7 +61,7 @@ char *opt_progname(const char *argv0)
     if (n > sizeof prog - 1)
         n = sizeof prog - 1;
     for (q = prog, i = 0; i < n; i++, p++)
-        *q++ = isupper(*p) ? tolower(*p) : *p;
+        *q++ = tolower((unsigned char)*p);
     *q = '\0';
     return prog;
 }
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