D21891: [wallpapers] Port away from deprecated function

[David Edmundson]

davidedmundson created this revision.
davidedmundson added a reviewer: Plasma.
Herald added a project: Plasma.
Herald added a subscriber: plasma-devel.
davidedmundson requested review of this revision.

TEST PLAN
  No warning

REPOSITORY
  R120 Plasma Workspace

BRANCH
  davidedmundson/ksession

REVISION DETAIL
  https://phabricator.kde.org/D21891

AFFECTED FILES
  wallpapers/image/backgroundlistmodel.cpp

To: davidedmundson, #plasma
Cc: plasma-devel, LeGast00n, jraleigh, fbampaloukas, GB_2, ragreen, Pitel, ZrenBot, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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