D29805: Thumbnail djvu: Avoid a crash when djvu is not installed

[Méven Car]

meven retitled this revision from "Thumbnail djvu: avoid to exit(1) when it should not" to "Thumbnail djvu: Avoid a crash when djvu is not installed".
meven edited the summary of this revision.

REPOSITORY
  R320 KIO Extras

REVISION DETAIL
  https://phabricator.kde.org/D29805

To: meven, #frameworks, broulik, ngraham, pino
Cc: pino, kde-frameworks-devel, kfm-devel, waitquietly, azyx, nikolaik, pberestov, iasensio, aprcela, fprice, LeGast00n, cblack, fbampaloukas, alexde, Codezela, feverfew, meven, michaelh, spoorun, navarromorales, firef, ngraham, andrebarros, bruns, emmanuelp, rdieter, mikesomov
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