D18558: Fix "QIODevice::read" warnings.

[Daniel Vrátil]

dvratil accepted this revision.
dvratil added a comment.
This revision is now accepted and ready to land.


  Thanks!

BRANCH
  2019_qiodevice_read (branched from Applications/18.12)

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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