D28659: Fix crashing on starting and quitting

[Martin Tobias Holmedahl Sandsmark]

sandsmark created this revision.
sandsmark added reviewers: Dolphin, elvisangelaccio.
sandsmark added a project: Dolphin.
Herald added a subscriber: kfm-devel.
sandsmark requested review of this revision.

REVISION SUMMARY
  To avoid having to lock and unlock the mutex everywhere (and ensure it is unlocked before calling other things that might lock it, etc.), do it as locally as possible.

TEST PLAN
  Doesn't crash all the time anymore, and doesn't randomly hang like when I tried to lock and unlock it "manually" everywhere.

REPOSITORY
  R318 Dolphin

REVISION DETAIL
  https://phabricator.kde.org/D28659

AFFECTED FILES
  src/kitemviews/kfileitemmodel.cpp

To: sandsmark, #dolphin, elvisangelaccio
Cc: kfm-devel, #dolphin, azyx, nikolaik, pberestov, iasensio, fprice, fbampaloukas, alexde, Codezela, feverfew, meven, spoorun, navarromorales, firef, ngraham, andrebarros, emmanuelp, rdieter, mikesomov
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