D19888: Add runtime guard that pages are KCMs in KCMultiDialog

[Rik Mills]

rikmills added a comment.


  Patch seemed to fix the crash. I don't use Kontact (apart from testing things like this), but on a quick test all seems functional once more.

REPOSITORY
  R295 KCMUtils

REVISION DETAIL
  https://phabricator.kde.org/D19888

To: davidedmundson
Cc: rikmills, kde-frameworks-devel, michaelh, ngraham, bruns
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