D6308: Fix crashy dialogs (found by krazy and by hand)

[Christoph Roick]

croick edited the summary of this revision.

REPOSITORY
  R33 KDevPlatform

REVISION DETAIL
  https://phabricator.kde.org/D6308

To: croick, #kdevelop
Cc: anthonyfieroni, kdevelop-devel
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