D8811: [knewstuff] Do not leak ImageLoader on error

[Anthony Fieroni]

anthonyfieroni marked an inline comment as done.

REPOSITORY
  R304 KNewStuff

REVISION DETAIL
  https://phabricator.kde.org/D8811

To: anthonyfieroni, leinir, dfaure
Cc: broulik, #frameworks, ZrenBot