D12113: Use nullptr. Use const/ref.

[Laurent Montel]

mlaurent created this revision.
Restricted Application added a project: Plasma.
Restricted Application added a subscriber: plasma-devel.
mlaurent requested review of this revision.

TEST PLAN
  Build

REPOSITORY
  R104 KScreen

BRANCH
  clean_code

REVISION DETAIL
  https://phabricator.kde.org/D12113

AFFECTED FILES
  kcm/src/declarative/qmloutput.cpp
  kcm/src/declarative/qmlscreen.cpp
  kcm/src/resolutionslider.cpp
  kcm/src/unifiedoutputconfig.cpp
  kcm/src/widget.cpp
  kded/generator.cpp
  kded/osd.cpp
  kded/osd.h

To: mlaurent
Cc: plasma-devel, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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