D9749: Simplify code: return early to reduce indentation depth

[Christoph Cullmann]

cullmann accepted this revision.

REPOSITORY
  R39 KTextEditor

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

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