[Differential] [Updated] D2557: [GreeterApp] Set wallpaperGraphicsObject to what the code actually expects

[broulik (Kai Uwe Broulik)]

broulik updated the summary for this revision.

REPOSITORY
  rKSCREENLOCKER KScreenLocker

REVISION DETAIL
  https://phabricator.kde.org/D2557

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To: broulik, #plasma
Cc: plasma-devel, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas