From: Pascal Cuoq <cuoq@trust-in-soft.com>
Date: Tue, 21 Jul 2020 15:54:26 +0000 (+0200)
Subject: Fixes #645
X-Git-Tag: json-c-0.15-20200726~4^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F646%2Fhead;p=thirdparty%2Fjson-c.git

Fixes #645
---

diff --git a/json_tokener.c b/json_tokener.c
index 63e02a14..6527270d 100644
--- a/json_tokener.c
+++ b/json_tokener.c
@@ -430,7 +430,7 @@ struct json_object *json_tokener_parse_ex(struct json_tokener *tok, const char *
 			{
 				char inf_char = *str;
 				if (!(tok->flags & JSON_TOKENER_STRICT))
-					inf_char = tolower((int)*str);
+					inf_char = tolower((unsigned char)*str);
 				if (inf_char != _json_inf_str[tok->st_pos])
 				{
 					tok->err = json_tokener_error_parse_unexpected;