D24150: Fix crash on exit in kio_file

[Ahmad Samir]

ahmadsamir added reviewers: dfaure, broulik.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D24150

To: hwti, cfeck, dfaure, broulik
Cc: kde-frameworks-devel, LeGast00n, GB_2, michaelh, ngraham, bruns