D23067: Clean up usage of m_client

[Frederik Gladhorn]

gladhorn added a comment.


  I hope this is now making the code slightly easier to read, without changing the functionallity, except for shuffling things around a tiny bit where we discussed. It also adds a few extra checks, to play safe with the smart pointers. These nullptr checks are extremely cheap.

REPOSITORY
  R108 KWin

REVISION DETAIL
  https://phabricator.kde.org/D23067

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