D23085: Make iterating over Layer enum simple

gladhorn created this revision.
gladhorn added a reviewer: KWin.
Herald added a project: KWin.
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REVISION SUMMARY
  Having a function with a confusing comment, to iterate over the enum,
  is mostly confusing. Make it boring by just moving the cast to the one
  place that uses it.

REPOSITORY
  R108 KWin

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D23085

AFFECTED FILES
  layers.cpp
  utils.h

To: gladhorn, #kwin
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