D15146: RFC: Don't consider KDiskFreeSpaceInfo valid if all relevant statvfs fields are zero

[Kai Uwe Broulik]

broulik added a reviewer: fvogt.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D15146

To: broulik, dfaure, ngraham, fvogt
Cc: kde-frameworks-devel, michaelh, ngraham, bruns