D21539: [FileIndexScheduler] Avoid emitting state changes multiple times

[Nathaniel Graham]

ngraham accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R293 Baloo

REVISION DETAIL
  https://phabricator.kde.org/D21539

To: bruns, #baloo, ngraham, astippich
Cc: kde-frameworks-devel, #baloo, gennad, domson, ashaposhnikov, michaelh, astippich, spoorun, ngraham, bruns, abrahams
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