From dbb708c56fdaa5d5cc99daf8f207ec0370348f47 Mon Sep 17 00:00:00 2001
From: Tatsuya Kinoshita <tats@debian.org>
Date: Fri, 6 Jan 2023 19:42:04 +0900
Subject: [PATCH] Avoid locale sensitive tolower in wc_charset_to_ces

---
 libwc/charset.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libwc/charset.c b/libwc/charset.c
index 6697e9e..a83e218 100644
--- a/libwc/charset.c
+++ b/libwc/charset.c
@@ -111,7 +111,7 @@ wc_charset_to_ces(char *charset)
     char buf[16];
     int n;
 
-    if (tolower(*p) == 'x' && *(p+1) == '-')
+    if ((*p == 'x' || *p == 'X') && *(p+1) == '-')
 	p += 2;
     for (n = 0; *p && n < 15; p++) {
 	if ((unsigned char)*p > 0x20 && *p != '_' && *p != '-')