D16771: Fix warning

[Aleix Pol Gonzalez]

apol created this revision.
apol added a reviewer: Plasma.
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REVISION SUMMARY
  Now if appIcon isn't defined, it will set the property as undefined.
  file:///home/apol/devel/kde5/share/plasma/plasmoids/org.kde.plasma.notifications/contents/ui/NotificationDelegate.qml:114: ReferenceError: appIcon is not defined

REPOSITORY
  R120 Plasma Workspace

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D16771

AFFECTED FILES
  applets/notifications/package/contents/ui/NotificationDelegate.qml

To: apol, #plasma
Cc: plasma-devel, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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