[PATCHv7] nss_db: protect against empty mappings

[Florian Weimer]

* DJ Delorie:

> Florian Weimer <fweimer@redhat.com> writes:
>> Please also post the planned commit message.  Thanks.
>
> I've been doing that in every patch, as $subject and comment text,
> although my current $subject in git is:
>
>     nss_db: fix endent wrt NULL mappings [BZ #24695] [BZ #24696]

Thanks, that's what I wanted to see.

> The test case runs "makedb" inside the testroot, so needs selinux
> DSOs installed.

If glibc has been built with SELinux support, I presume.

Thanks,
Florian