[gnome-software/1307-installed-page-empty-sections-not-hidden] gs-installed-page: Correct update_group_visibility_cb()

[Milan Crha <mcrha src gnome org>]

commit fe2a010040f8042a3df9114c2db8ac540ec96dc2
Author: Milan Crha <mcrha redhat com>
Date:   Wed Jul 28 18:20:26 2021 +0200

    gs-installed-page: Correct update_group_visibility_cb()
    
    The group should be hidden, if its list box is empty, not if
    the group is empty, because the group always contains its list box.

 src/gs-installed-page.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/src/gs-installed-page.c b/src/gs-installed-page.c
index e1149b8ec..3291050c9 100644
--- a/src/gs-installed-page.c
+++ b/src/gs-installed-page.c
@@ -638,11 +638,13 @@ gs_installed_page_dispose (GObject *object)
 }
 
 static void
-update_group_visibility_cb (GtkWidget *group)
+update_group_visibility_cb (GtkWidget *group,
+                           GtkWidget *widget,
+                           GtkWidget *list_box)
 {
        g_autoptr(GList) children = NULL;
 
-       children = gtk_container_get_children (GTK_CONTAINER (group));
+       children = gtk_container_get_children (GTK_CONTAINER (list_box));
        gtk_widget_set_visible (group, children != NULL);
 }