ws2_32: Fix some edge cases for getaddrinfo in BSD and OSX

[Dmitry Timoshkov]

Bruno Jesus <00cpxxx at gmail.com> wrote:

> +    /* servname tweaks required by OSX and BSD kernels */
> +    if (!servname)
> +        serv = NULL;
> +    else if (!servname[0])
> +        serv = "0";
> +    else
> +        serv = servname;

Shouldn't 'serv = "0"' be 'serv = ""' ?

-- 
Dmitry.