D17315: Avoid potential nullptr access for Document, use reference instead

[Alexander Stippich]

astippich accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R293 Baloo

REVISION DETAIL
  https://phabricator.kde.org/D17315

To: bruns, #baloo, #frameworks, astippich, ngraham
Cc: kde-frameworks-devel, ashaposhnikov, michaelh, astippich, spoorun, ngraham, bruns, abrahams
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.kde.org/pipermail/kde-frameworks-devel/attachments/20181203/b2cae91c/attachment.html>