Philippe Normand authored Aug 31, 2021 and GStreamer Marge Bot committed Aug 31, 2021

The QQuickItem::size() method was introduced in 5.10, so use direct width() and
height() access instead.

Fixes #908

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/1069>