D10543: fix crashing with duplicate entries

[Martin Tobias Holmedahl Sandsmark]

sandsmark added a dependency: D10551: autotest for crashing in KArchiveDirectory::addEntry.

REPOSITORY
  R243 KArchive

REVISION DETAIL
  https://phabricator.kde.org/D10543

To: sandsmark, dfaure, #frameworks
Cc: apol, michaelh
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