D9928: Fix one source of log spam referenced in Bug 388389 (Empty filename passed to function)

[David Edmundson]

davidedmundson accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R242 Plasma Framework (Library)

REVISION DETAIL
  https://phabricator.kde.org/D9928

To: rkron, #frameworks, davidedmundson
Cc: alexeymin, aacid, #frameworks
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