D12125: Avoid inserting an invalid "Size" property from the Filesystem interface

[Stefan Brüns]

bruns added a dependency: D12124: Avoid creating duplicate property entries in 
the cache.

REPOSITORY
  R245 Solid

REVISION DETAIL
  https://phabricator.kde.org/D12125

To: bruns
Cc: #frameworks, michaelh, ngraham, bruns