D28457: kdirwatch: fix a recently introduced crash

[Méven Car]

meven created this revision.
meven added reviewers: bruns, Frameworks, iasensio.
Herald added a project: Frameworks.
Herald added a subscriber: kde-frameworks-devel.
meven requested review of this revision.

REVISION SUMMARY
  Prevent a crash when browsing nfs without FAM installed introduced in D28349 <https://phabricator.kde.org/D28349>

REPOSITORY
  R244 KCoreAddons

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D28457

AFFECTED FILES
  src/lib/io/kdirwatch.cpp

To: meven, bruns, #frameworks, iasensio
Cc: kde-frameworks-devel, LeGast00n, cblack, GB_2, michaelh, ngraham, bruns
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