[gtk/gbsneto/install-header] boxlayout: Notify orientation changes

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 56d420c06e9d8514c1c328925c1adebd953a8fa4
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Wed Mar 27 23:25:22 2019 -0300

    boxlayout: Notify orientation changes
    
    This was missing from the initial implementation, and
    breaks the tests.

 gtk/gtkboxlayout.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/gtk/gtkboxlayout.c b/gtk/gtkboxlayout.c
index 0b88e39fcf..5d3ef2bd0d 100644
--- a/gtk/gtkboxlayout.c
+++ b/gtk/gtkboxlayout.c
@@ -91,6 +91,8 @@ gtk_box_layout_set_orientation (GtkBoxLayout   *self,
     _gtk_orientable_set_style_classes (GTK_ORIENTABLE (widget));
 
   gtk_layout_manager_layout_changed (layout_manager);
+
+  g_object_notify (G_OBJECT (self), "orientation");
 }
 
 static void