Make sure SDL_CreateThread has the same signature regardless of how the DLL was created.
diff --git a/include/SDL_thread.h b/include/SDL_thread.h
index b9e9575..7a779d5 100644
--- a/include/SDL_thread.h
+++ b/include/SDL_thread.h
@@ -69,7 +69,7 @@
  */
 typedef int (SDLCALL * SDL_ThreadFunction) (void *data);
 
-#if defined(__WIN32__) && !defined(HAVE_LIBC)
+#if defined(__WIN32__)
 /**
  *  \file SDL_thread.h
  *