D17917: unifiedmailboxagent: Stop using std::optional.

[Raphael Kubo da Costa]

rakuco added a reviewer: FreeBSD.
rakuco removed a subscriber: FreeBSD.

REPOSITORY
  R206 KMail

REVISION DETAIL
  https://phabricator.kde.org/D17917

To: rakuco, dvratil, #freebsd
Cc: kde-pim, dvasin, rodsevich, winterz, vkrause, mlaurent, knauss, dvratil
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.kde.org/pipermail/kde-pim/attachments/20190102/2fdf94fd/attachment.html>