D9749: Simplify code: return early to reduce indentation depth

[Kevin Funk]

kfunk accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R39 KTextEditor

REVISION DETAIL
  https://phabricator.kde.org/D9749

To: mwolff, #kate, kfunk
Cc: #frameworks, michaelh, kevinapavew, ngraham, demsking, cullmann, sars, dhaumann
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