D27736: Fix for not try to check error or try to disconnect if there isn't m_deviceToTearDown exist

[Birkhoff Cheng]

birkhoff added a comment.


  On my Arch virtual machine, if I have the terminal open when ejecting an optical disc (working directory in the disc), dolphin doesn't do anything. It probably returned too early or m_deviceToTearDown is falsely set to nullptr for some reason.

REPOSITORY
  R318 Dolphin

REVISION DETAIL
  https://phabricator.kde.org/D27736

To: usta, #dolphin, ngraham, meven, elvisangelaccio
Cc: birkhoff, kfm-devel, pberestov, iasensio, fprice, MrPepe, fbampaloukas, alexde, Codezela, feverfew, meven, spoorun, navarromorales, firef, ngraham, andrebarros, emmanuelp, mikesomov
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