[gdl: 1/2] Add definition of gdl_dock_object_class_set_is_compound

[Sebastien Granjoux <sgranjoux src gnome org>]

commit c601d380cbd911bb24970ac7372f61d005896834
Author: Ruben Di Battista <rubendibattista gmail com>
Date:   Wed Aug 18 23:52:43 2021 +0200

    Add definition of gdl_dock_object_class_set_is_compound
    
    This fixes a build problem on macOS Big Sur
    
    See: https://trac.macports.org/ticket/61723

 gdl/gdl-dock-object.h | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/gdl/gdl-dock-object.h b/gdl/gdl-dock-object.h
index a244768..c060472 100644
--- a/gdl/gdl-dock-object.h
+++ b/gdl/gdl-dock-object.h
@@ -351,6 +351,9 @@ GdkPixbuf     *gdl_dock_object_get_pixbuf        (GdlDockObject    *object);
 void           gdl_dock_object_set_pixbuf        (GdlDockObject    *object,
                                                   GdkPixbuf        *icon);
 
+void          gdl_dock_object_class_set_is_compound (GdlDockObjectClass *object_class,
+                                                     gboolean           is_compound);
+
 
 /* other types */