fix peak-thread, GUI-thread race condition

[ardour.git] / gtk2_ardour / group_tabs.h

diff --git a/gtk2_ardour/group_tabs.h b/gtk2_ardour/group_tabs.h
index ff231e8a681c89a8105f0bb1eef91ab4be5fd150..95b3ec5751ef3e7b4701cdf4cc617a2c2b2ed977 100644 (file)
--- a/gtk2_ardour/group_tabs.h
+++ b/gtk2_ardour/group_tabs.h
@@ -91,7 +91,7 @@ private:
        virtual double extent () const = 0;
 
        virtual void add_menu_items (Gtk::Menu *, ARDOUR::RouteGroup *) {}
-       virtual PBD::PropertyList default_properties () const = 0;
+       virtual PBD::PropertyList default_properties () const;
        virtual ARDOUR::RouteList selected_routes () const = 0;
        virtual void sync_order_keys () = 0;