D15405: [EPS] Fix crash at app shutdown (being tried to persist clipboard image)

[David Faure]

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

REPOSITORY
  R287 KImageFormats

BRANCH
  fixepscrashonappshutdown

REVISION DETAIL
  https://phabricator.kde.org/D15405

To: kossebau, zccrs, dfaure, pino
Cc: kde-frameworks-devel, michaelh, ngraham, bruns