D12822: Added null check in OverlayDrawer

[Aleix Pol Gonzalez]

apol added a comment.


  Already done in https://phabricator.kde.org/D12741.
  
  Or I'm missing something?

REPOSITORY
  R169 Kirigami

REVISION DETAIL
  https://phabricator.kde.org/D12822

To: Dax
Cc: apol, plasma-devel, davidedmundson, mart, hein