sdl12-compat: Don't use malloc.h in SDL_config.h

From 3f13df25050765206a2458fa86247a173eb984aa Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Tue, 1 Jun 2021 10:42:57 -0400
Subject: [PATCH] Don't use malloc.h in SDL_config.h

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

diff --git a/include/SDL/SDL_config.h b/include/SDL/SDL_config.h
index eb7fe47..e9f4c2d 100644
--- a/include/SDL/SDL_config.h
+++ b/include/SDL/SDL_config.h
@@ -64,7 +64,6 @@ stage, though. Send patches if your platform lacks something. */
 #define HAVE_STDIO_H 1
 #define STDC_HEADERS 1
 #define HAVE_STDLIB_H 1
-#define HAVE_MALLOC_H 1
 #define HAVE_MEMORY_H 1
 #define HAVE_STRING_H 1
 #define HAVE_STRINGS_H 1
@@ -127,6 +126,7 @@ stage, though. Send patches if your platform lacks something. */
 
 /* things that aren't necessarily in Linux, some are MSVC C runtime, some are BSD. Send patches. */
 #if 0
+#define HAVE_MALLOC_H 1
 #define HAVE_BCOPY 1
 #define HAVE_ATOI 1
 #define HAVE_ATOF 1