tabbox: Fix a crash in ClientModel::createStackingOrderClientList()
stacking
can be empty, in which case, QList::first() must not be called.
(cherry picked from commit a9de5267)
Co-authored-by: Vlad Zahorodnii vlad.zahorodnii@kde.org
stacking
can be empty, in which case, QList::first() must not be called.
(cherry picked from commit a9de5267)
Co-authored-by: Vlad Zahorodnii vlad.zahorodnii@kde.org