[patch] Let stddef.h redefine NULL if __need_NULL is set

[Joerg Sonnenberger]

On Sun, Apr 27, 2014 at 02:50:16PM -0700, Nico Weber wrote:
> small.cc:6:18: error: missing sentinel in function call [-Werror,-Wsentinel]
>   foo("bar", NULL);

This is just broken code. Why we do we want to workaround that?

Joerg