Switch AccessibleChartView::m_xParent from a weak
reference of the abstract XAccessible interface to
a weak reference of the more concrete OAccessible class.
Change-Id: Iba9f410979c079735b6c41723206b2ac76c1dc1b
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/210602
Tested-by: Jenkins
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>
Michael Weghorn
bb11afbcd7