[gtk/kill-containers: 18/76] Fix a leftover list box child

[Matthias Clasen <matthiasc src gnome org>]

commit 80d0e984be9ea236fb9178514ec549c3d4b09856
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri May 8 12:26:50 2020 -0400

    Fix a leftover list box child
    
    We were still using container api on a list box child here.

 demos/constraint-editor/constraint-editor-window.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/demos/constraint-editor/constraint-editor-window.c 
b/demos/constraint-editor/constraint-editor-window.c
index 1a78092994..20357544dd 100644
--- a/demos/constraint-editor/constraint-editor-window.c
+++ b/demos/constraint-editor/constraint-editor-window.c
@@ -607,7 +607,7 @@ create_widget_func (gpointer item,
   gtk_widget_set_margin_bottom (label, 10);
   gtk_label_set_xalign (GTK_LABEL (label), 0.0);
   gtk_widget_set_hexpand (label, TRUE);
-  gtk_container_add (GTK_CONTAINER (row), box);
+  gtk_list_box_row_set_child (GTK_LIST_BOX_ROW (row), box);
   gtk_container_add (GTK_CONTAINER (box), label);
 
   if (GTK_IS_CONSTRAINT (item) || GTK_IS_CONSTRAINT_GUIDE (item))