D6653: [Notifications] Check for corona to avoid crash

[Kai Uwe Broulik]

broulik edited the test plan for this revision.

REPOSITORY
  R120 Plasma Workspace

REVISION DETAIL
  https://phabricator.kde.org/D6653

To: broulik, #plasma
Cc: plasma-devel, ZrenBot, progwolff, lesliezhai, ali-mohamed, jensreuterberg, 
abetts, sebas, apol, mart, lukas