D22689: Replace QString::null with QString

[Nicolas Fella]

nicolasfella requested changes to this revision.
This revision now requires changes to proceed.

REPOSITORY
  R249 KI18n

REVISION DETAIL
  https://phabricator.kde.org/D22689

To: aacid, apol, nicolasfella
Cc: nicolasfella, kde-frameworks-devel, LeGast00n, sbergeron, michaelh, ngraham, bruns
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