[gtk+/gtk-3-22] Deprecate GtkContainer::child

[Matthias Clasen <matthiasc src gnome org>]

commit a372f554ebc46f9f68df70b2d30f00f6eae8d30a
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Oct 21 10:21:44 2016 -0400

    Deprecate GtkContainer::child
    
    It is gone in GTK+ 4, so let it deprecate here.

 gtk/gtkcontainer.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkcontainer.c b/gtk/gtkcontainer.c
index 55feadf..55201ee 100644
--- a/gtk/gtkcontainer.c
+++ b/gtk/gtkcontainer.c
@@ -547,7 +547,7 @@ gtk_container_class_init (GtkContainerClass *class)
                            P_("Child"),
                            P_("Can be used to add a new child to the container"),
                            GTK_TYPE_WIDGET,
-                           GTK_PARAM_WRITABLE);
+                           GTK_PARAM_WRITABLE|G_PARAM_DEPRECATED);
 
   g_object_class_install_properties (gobject_class, LAST_PROP, container_props);