[gtk+] actionbar: Call g_object_class_install_properties()

[Kjell Ahlstedt <kjellahl src gnome org>]

commit e2744aa74f72d2973dec5a9e34a4867648c701f7
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Mon Jul 24 10:19:05 2017 +0200

    actionbar: Call g_object_class_install_properties()
    
    https://bugzilla.gnome.org/show_bug.cgi?id=785318

 gtk/gtkactionbar.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkactionbar.c b/gtk/gtkactionbar.c
index 569d740..f664735 100644
--- a/gtk/gtkactionbar.c
+++ b/gtk/gtkactionbar.c
@@ -68,6 +68,7 @@ enum {
 };
 
 enum {
+  PROP_0,
   PROP_REVEALED,
   LAST_PROP
 };
@@ -398,6 +399,8 @@ gtk_action_bar_class_init (GtkActionBarClass *klass)
                           TRUE,
                           GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
 
+  g_object_class_install_properties (object_class, LAST_PROP, props);
+
   gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_PANEL);
   gtk_widget_class_set_css_name (widget_class, "actionbar");
 }