D16522: [Extractor] Do not check QFile::exists for an empty url

[Kai Uwe Broulik]

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

REPOSITORY
  R293 Baloo

BRANCH
  extractor

REVISION DETAIL
  https://phabricator.kde.org/D16522

To: bruns, #baloo, #frameworks, dfaure, apol, broulik
Cc: kde-frameworks-devel, ashaposhnikov, michaelh, astippich, spoorun, ngraham, 
bruns, abrahams