D13559: Fix some of cppcheck warnings

[Albert Astals Cid]

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

REPOSITORY
  R127 KWayland

BRANCH
  fix-cppcheck

REVISION DETAIL
  https://phabricator.kde.org/D13559

To: bshah, #frameworks, aacid
Cc: apol, aacid, kde-frameworks-devel, michaelh, ngraham, bruns
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