[PATCH] notmuch_message_file_get_header: use talloc for hash table entries

[David Bremner]

david at tethera.net writes:

>
> On the other hand, as Tomi points out in id:m2a9tlfaza.fsf at guru.guru-group.fi,
> Sometimes the string is allocated with with xmalloc.
>
> This patch tries to unify everything to use talloc.
>

This was meant to be in reply to id:m2a9tlfaza.fsf at guru.guru-group.fi,
but I fumbled it.