D8697: Don't check whether an empty filename exists

[Aleix Pol Gonzalez]

apol added a comment.


  Here's an alternative: https://codereview.qt-project.org/210716

REPOSITORY
  R241 KIO

BRANCH
  fix-empty-exists

REVISION DETAIL
  https://phabricator.kde.org/D8697

To: elvisangelaccio, dfaure
Cc: apol, #frameworks