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

[Anthony Fieroni]

anthonyfieroni added a reviewer: davidedmundson.

REPOSITORY
  R242 Plasma Framework (Library)

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

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