D8968: Prevent index out of range in case of empty or malformed filename

[Daniel Vrátil]

dvratil added a comment.


  You are right that the code should return an empty string in case the filename is missing in the payload data. I'll add that in a separate commit since it requires that the situation is correctly handled by all users of this method.
  
  Merging this safety still makes sense in case some other corruption occurs, so please fix the code as Sandro requested.

REPOSITORY
  R165 Akonadi

REVISION DETAIL
  https://phabricator.kde.org/D8968

To: ahartmetz, #kde_pim, dvratil
Cc: knauss, #kde_pim, dvasin, winterz, vkrause, mlaurent, dvratil
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