D19407: ModeBase::goToPos: Ensure jump target is valid

[loh tar]

loh.tar edited the summary of this revision.

REPOSITORY
  R39 KTextEditor

REVISION DETAIL
  https://phabricator.kde.org/D19407

To: loh.tar, #ktexteditor
Cc: dhaumann, kwrite-devel, kde-frameworks-devel, #ktexteditor, domson, 
michaelh, ngraham, bruns, demsking, cullmann, sars