D24442: ensure winId() not called on non-native widgets

[Christoph Cullmann]

cullmann added a reviewer: Frameworks.

REPOSITORY
  R252 Framework Integration

REVISION DETAIL
  https://phabricator.kde.org/D24442

To: cullmann, #frameworks
Cc: broulik, kde-frameworks-devel, LeGast00n, GB_2, michaelh, ngraham, bruns