D18558: Fix "QIODevice::read" warnings.

[Laurent Montel]

mlaurent added a comment.


  For me this patch seems correct.
  +1

REPOSITORY
  R165 Akonadi

REVISION DETAIL
  https://phabricator.kde.org/D18558

To: dfaure, dvratil, sengels
Cc: mlaurent, kde-pim, dvasin, rodsevich, winterz, vkrause, knauss, dvratil
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