D28011: Fix build with 5.14.2 and 5.15 beta2

[Laurent Montel]

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

REPOSITORY
  R84 PIM: KMail Transport

BRANCH
  arcpatch-D28011

REVISION DETAIL
  https://phabricator.kde.org/D28011

To: carewolf, mlaurent
Cc: anthonyfieroni, kde-pim, fbampaloukas, dcaliste, dvasin, rodsevich, winterz, vkrause, mlaurent, knauss, dvratil
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