[gnome-games] game-thumbnail: Save forgotten connection ID

[Adrien Plazas <aplazas src gnome org>]

commit c67bc2a70b8ab646ac2ad9f25355fb4ff6bd60ce
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Fri Dec 1 07:34:06 2017 +0100

    game-thumbnail: Save forgotten connection ID

 src/ui/game-thumbnail.vala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/ui/game-thumbnail.vala b/src/ui/game-thumbnail.vala
index 76a2a42..3394428 100644
--- a/src/ui/game-thumbnail.vala
+++ b/src/ui/game-thumbnail.vala
@@ -40,7 +40,7 @@ private class Games.GameThumbnail: Gtk.DrawingArea {
                        _cover = value;
 
                        if (_cover != null)
-                               _cover.changed.connect (invalidate_cover);
+                               cover_changed_id = _cover.changed.connect (invalidate_cover);
 
                        invalidate_cover ();
                }