D11088: [KFilePlacesView] Call KDiskFreeSpaceInfo only if neccessary

[David Edmundson]

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

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D11088

To: broulik, #frameworks, davidedmundson
Cc: ngraham, michaelh