Filip Roséen authored Jul 08, 2016 and Jean-Baptiste Kempf committed Jul 08, 2016

Close #17023

The problem behind the issue is that the QModelIndex sent
through "emit currentIndexChanged( ... )" previously referred to an
AbstractPLItem that is destroyed during the playlist sorting.

This fixes the issue by grabbing the associated input_item_t*
prior to sorting/destroying the item list, and then conditionally using
the retrieved handle to construct a new QModelIndex (referring to the
correct entity), referring to the correct entity within the
recontrustructed list.

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>