D6332: [kcms/touchpad] Fix warning 'returning reference to temporary'

[Christoph Feck]

cfeck created this revision.
cfeck added a project: Plasma.
Restricted Application added a subscriber: plasma-devel.

REVISION SUMMARY
  Our APIs still should not declare reference results for implicitly shared objects.
  
  This is not a problem with the current backends, because they just return a reference to their member data. It is a problem in the virtual base, though.

REPOSITORY
  R119 Plasma Desktop

REVISION DETAIL
  https://phabricator.kde.org/D6332

AFFECTED FILES
  kcms/touchpad/src/backends/kwin_wayland/kwinwaylandbackend.h
  kcms/touchpad/src/backends/x11/xlibbackend.h
  kcms/touchpad/src/touchpadbackend.h

To: cfeck, #plasma, subdiff, knambiar
Cc: plasma-devel, ZrenBot, spstarr, progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart, lukas
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