[Patches] Backport Heimdal fixes for PKINIT (bug #12986)

[Doug Nazar]

On 8/28/17 4:32 AM, Stefan Metzmacher via samba-technical wrote:
> +    if (dhparam.q) {
> +	dh->q = integer_to_BN(context, "DH p-1 factor", dhparam.q);
> +	if (dh->g == NULL)
> +	    goto out;
> +    }

Should that be dh->qin the null check?

Doug