D6317: fix crash on Windows when deleting an instance of QtMultimediaExtractor

[Matthieu Gallien]

mgallien edited reviewers, added: Frameworks; removed: kde-frameworks-devel.

REPOSITORY
  R286 KFileMetaData

REVISION DETAIL
  https://phabricator.kde.org/D6317

To: mgallien, #frameworks
Cc: #frameworks