D5828: fix plasma-frameworks build without kwayland

[David Edmundson]

davidedmundson accepted this revision.

REPOSITORY
  R242 Plasma Framework (Library)

REVISION DETAIL
  https://phabricator.kde.org/D5828

To: winterz, mart, davidedmundson, bshah, #plasma
Cc: dfaure, asturmlechner, apol, #frameworks