Don't know how to handle 'hint', use qRegisterMetaType to register it.

becomes:

QSignalSpy: Unable to handle parameter 'hint' of type 'QAbstractItemModel::LayoutChangeHint' of method 'layoutChanged', use qRegisterMetaType to register it.

Task-number: QTBUG-49623
Change-Id: I5020bb5b6f4ba87438d0f862279bed1ceb203d12
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>