sdl12-compat: headers: fix SDL_atoi()

SDL Commits
1 
From d71c89535f3d8bf9a3f0829f52b26d13c7c6c5f7 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Wed, 8 Dec 2021 17:01:20 +0300
Subject: [PATCH] headers: fix SDL_atoi()

---
 include/SDL/SDL_stdinc.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/SDL/SDL_stdinc.h b/include/SDL/SDL_stdinc.h
index a6e364a..aa070c4 100644
--- a/include/SDL/SDL_stdinc.h
+++ b/include/SDL/SDL_stdinc.h
@@ -410,7 +410,7 @@ extern DECLSPEC int SDLCALL SDL_vsnprintf(char *text, size_t maxlen, const char
 
 #define SDL_itoa(value, string, radix) SDL_ltoa((long)value, string, radix)
 #define SDL_uitoa(value, string, radix) SDL_ultoa((long)value, string, radix)
-#define SDL_atoi(X)     SDL_strtol(X, NULL, 0)
+#define SDL_atoi(X)     SDL_strtol(X, NULL, 10)
 #define SDL_atof(X)     SDL_strtod(X, NULL)
 
 #define SDL_ICONV_ERROR (size_t)-1