[gnome-music/cherry-pick-247f474e] albumwidget: Fix crash on switch back from search

[Marinus Schraal <mschraal src gnome org>]

commit e89491256f814d7ef38a72e6c9cc3f0957c8710e
Author: Marinus Schraal <mschraal gnome org>
Date:   Thu Oct 17 21:10:34 2019 +0000

    albumwidget: Fix crash on switch back from search
    
    When switching back from search view Music crashes, because it does not
    receive the expected CoreAlbum from the 'album' property of AlbumWidget.
    This is probably fall-out from the core rewrite: AlbumsView expects a
    CoreAlbum, AlbumWidget supplies a Grl.Media.
    
    Have the 'album' property return a CoreAlbum instead.
    
    
    (cherry picked from commit 247f474e156cba8c188232a11cac21db2906cc54)

 gnomemusic/widgets/albumwidget.py | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)
---
diff --git a/gnomemusic/widgets/albumwidget.py b/gnomemusic/widgets/albumwidget.py
index ac1c661a..3c298dff 100644
--- a/gnomemusic/widgets/albumwidget.py
+++ b/gnomemusic/widgets/albumwidget.py
@@ -44,7 +44,6 @@ class AlbumWidget(Gtk.EventBox):
         """
         super().__init__()
 
-        self._album = None
         self._corealbum = None
         self._duration_signal_id = None
         self._model_signal_id = None
@@ -80,7 +79,6 @@ class AlbumWidget(Gtk.EventBox):
 
         self._set_composer_label(corealbum)
 
-        self._album = self._corealbum.props.media
         self._album_model = self._corealbum.props.model
         self._model_signal_id = self._album_model.connect_after(
             "items-changed", self._on_model_items_changed)
@@ -183,11 +181,11 @@ class AlbumWidget(Gtk.EventBox):
         self._listbox.select_none()
 
     @GObject.Property(
-        type=Grl.Media, default=False, flags=GObject.ParamFlags.READABLE)
+        type=Grl.Media, default=None, flags=GObject.ParamFlags.READABLE)
     def album(self):
         """Get the current album.
 
         :returns: the current album
-        :rtype: Grl.Media
+        :rtype: CoreAlbum
         """
-        return self._album
+        return self._corealbum