D12047: Avoid crash when reading corrupt data from document terms db

[Stefan Brüns]

bruns added a reviewer: ngraham.

REPOSITORY
  R293 Baloo

REVISION DETAIL
  https://phabricator.kde.org/D12047

To: bruns, #baloo, michaelh, ngraham
Cc: #frameworks, ashaposhnikov, michaelh, astippich, spoorun, ngraham, bruns, 
alexeymin