D19168: Fix crash in Dolphin when dropping trashed file in trash

[Dominik Haumann]

dhaumann added a reviewer: dfaure.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D19168

To: hallas, #frameworks, elvisangelaccio, ngraham, dfaure
Cc: kde-frameworks-devel, michaelh, ngraham, bruns