SDL: os2iconv.c (_createUconvObj): cast to unsigned char, to be safe.

SDL Commits
1 
From dac6516057f8e553a7e8eee3a25baceff048caa4 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Fri, 17 Dec 2021 02:50:40 +0300
Subject: [PATCH] os2iconv.c (_createUconvObj): cast to unsigned char, to be
 safe.

---
 src/core/os2/geniconv/os2iconv.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/core/os2/geniconv/os2iconv.c b/src/core/os2/geniconv/os2iconv.c
index 2aed47f0531..c24cc54dcee 100644
--- a/src/core/os2/geniconv/os2iconv.c
+++ b/src/core/os2/geniconv/os2iconv.c
@@ -73,7 +73,8 @@ static int _createUconvObj(const char *code, UconvObject *uobj)
 {
     UniChar uc_code[MAX_CP_NAME_LEN];
     int i;
-    const char *ch = code;
+    const unsigned char *ch =
+         (const unsigned char *)code;
 
     if (code == NULL)
         uc_code[0] = 0;