SDL: cmake: add HAVE_STDDEF_H to SDL_config.h.cmake

From f8aa00d1980bdf05f49e7173af7c6646fb67ca0d Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <[EMAIL REDACTED]>
Date: Thu, 28 Jul 2022 16:30:02 +0200
Subject: [PATCH] cmake: add HAVE_STDDEF_H to SDL_config.h.cmake

---
 include/SDL_config.h.cmake | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/SDL_config.h.cmake b/include/SDL_config.h.cmake
index 043817f44d8..3c8edffec83 100644
--- a/include/SDL_config.h.cmake
+++ b/include/SDL_config.h.cmake
@@ -64,6 +64,7 @@
 #cmakedefine HAVE_MEMORY_H 1
 #cmakedefine HAVE_SIGNAL_H 1
 #cmakedefine HAVE_STDARG_H 1
+#cmakedefine HAVE_STDDEF_H 1
 #cmakedefine HAVE_STDINT_H 1
 #cmakedefine HAVE_STDIO_H 1
 #cmakedefine HAVE_STDLIB_H 1