D6070: fix warnings from clazy with the default warning level

[Matthieu Gallien]

mgallien created this revision.
Restricted Application added a project: Frameworks.

REVISION SUMMARY
  fix warnings from clazy with the default warning level

TEST PLAN
  automatic tests still work as expected on Linux

REPOSITORY
  R286 KFileMetaData

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D6070

AFFECTED FILES
  autotests/epubextractortest.cpp
  autotests/exiv2extractortest.cpp
  autotests/popplerextractortest.cpp
  autotests/taglibextractortest.cpp
  src/externalextractor.cpp
  src/externalextractor.h
  src/externalwriter.cpp
  src/externalwriter.h
  src/extractorcollection.cpp
  src/writedata.cpp
  src/writedata.h
  src/writer.h
  src/writer_p.h
  src/writercollection.cpp
  src/writercollection.h
  src/writers/taglibwriter.cpp

To: mgallien, #frameworks
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