[gnome-music/wip/mschraal/gtk4-v3: 246/248] artstack: Only act on a new coreartist

[Marinus Schraal <mschraal src gnome org>]

commit e58538acce74d061913a4c0dd9b98250d9367448
Author: Marinus Schraal <mschraal gnome org>
Date:   Mon Feb 14 02:44:20 2022 +0100

    artstack: Only act on a new coreartist

 gnomemusic/widgets/artstack.py | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/gnomemusic/widgets/artstack.py b/gnomemusic/widgets/artstack.py
index a7b11f595..8daa12c48 100644
--- a/gnomemusic/widgets/artstack.py
+++ b/gnomemusic/widgets/artstack.py
@@ -128,6 +128,9 @@ class ArtStack(Gtk.Stack):
 
     @coreobject.setter  # type: ignore
     def coreobject(self, coreobject: CoreObject) -> None:
+        if coreobject is self._coreobject:
+            return
+
         if self._thumbnail_id != 0:
             self._coreobject.disconnect(self._thumbnail_id)
             self._thumbnail_id = 0