Re: c-strtod: improve error checking

[Bruno Haible]

Hi Jim,

> I prefer to avoid casts, so please use this test instead:
> 
>      if (!c_locale)

If you prefer this way. I committed it like you say.

> > +  c_locale = newlocale (LC_ALL_MASK, "C", (locale_t)0);
> 
> I suppose NULL isn't necessarily defined

POSIX explicitly mentions (locale_t)0. I suppose it's because it's not
specified whether locale_t is an integral type or a pointer type. For this
reason, writing NULL could lead to gcc warnings (if locale_t is an integral
type).

Bruno