D24584: Add a few const &

[Albert Astals Cid]

aacid created this revision.
Herald added projects: Frameworks, Baloo.
Herald added subscribers: Baloo, kde-frameworks-devel.
aacid requested review of this revision.

REVISION SUMMARY
  These things aren't super expensive to copy, but const & is less expensive

REPOSITORY
  R293 Baloo

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D24584

AFFECTED FILES
  src/engine/idtreedb.cpp
  src/engine/writetransaction.cpp
  src/engine/writetransaction.h
  src/kioslaves/search/kio_search.cpp
  src/kioslaves/search/kio_search.h

To: aacid
Cc: kde-frameworks-devel, #baloo, hurikhan77, lots0logs, LeGast00n, fbampaloukas, GB_2, domson, ashaposhnikov, michaelh, astippich, spoorun, ngraham, bruns, abrahams
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