Fixed undeclared function warning (atexit) on non-Windows platforms.
#include "lauxlib.h"
#include "lualib.h"
+#include <stdlib.h>
+
#define PREMAKE_VERSION "5.0.0-dev"
#define PREMAKE_COPYRIGHT "Copyright (C) 2002-2017 Jason Perkins and the Premake Project"
#define PREMAKE_PROJECT_URL "https://github.com/premake/premake-core/wiki"
#if PLATFORM_WINDOWS
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
-#include <stdlib.h>
#else
#include <unistd.h>
#endif
