D3987: Use nullptr in all Frameworks (just diff in KIO shown here)

[Friedrich W. H. Kossebau]

kossebau closed this revision.

REPOSITORY
  R280 Prison

REVISION DETAIL
  https://phabricator.kde.org/D3987

To: kfunk, #frameworks, dfaure, kossebau
Cc: skelly, kossebau, dfaure, graesslin