Add cast to int on tolower() to fix warnings about array subscripts.

diff --git a/json_tokener.c b/json_tokener.c
index 416058d405e3358d3b719c4decda996d202a9c35..620468e41c7d2402c7b895b61bc01a760f429c3b 100644 (file)
--- a/json_tokener.c
+++ b/json_tokener.c
@@ -403,7 +403,7 @@ struct json_object* json_tokener_parse_ex(struct json_tokener *tok,
        {
                char inf_char = *str;
                if (!(tok->flags & JSON_TOKENER_STRICT))
-                       inf_char = tolower(*str);
+                       inf_char = tolower((int)*str);
                if (inf_char != _json_inf_str[tok->st_pos])
                {
                        tok->err = json_tokener_error_parse_unexpected;