D24337: Don't crash if we don't have a terminal

[Hannah von Reth]

vonreth added reviewers: dfaure, mlaurent.

REPOSITORY
  R318 Dolphin

REVISION DETAIL
  https://phabricator.kde.org/D24337

To: vonreth, dfaure, mlaurent
Cc: kfm-devel, iasensio, fprice, MrPepe, fbampaloukas, alexde, Codezela, feverfew, meven, spoorun, navarromorales, firef, andrebarros, emmanuelp, mikesomov
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