D20194: Fix a typo

[Albert Astals Cid]

aacid accepted this revision.

REPOSITORY
  R575 Okular Website (okular.kde.org)

REVISION DETAIL
  https://phabricator.kde.org/D20194

To: sander, #okular, ngraham, aacid
Cc: aacid, ngraham, ltoscano, okular-devel, joaonetto, tfella, darcyshen