prevent 0-pointer dereference in editor_routes.cc - fixes #5794

diff --git a/gtk2_ardour/editor.cc b/gtk2_ardour/editor.cc
index cf3eab57245640583676310de71b17570cebe163..faa2a0cf56cc34a2e014b009b8b7178c77410821 100644 (file)
--- a/gtk2_ardour/editor.cc
+++ b/gtk2_ardour/editor.cc
@@ -4871,8 +4871,10 @@ Editor::add_routes (RouteList& routes)
                rtv->view()->RegionViewRemoved.connect (sigc::mem_fun (*this, &Editor::region_view_removed));
        }
 
                rtv->view()->RegionViewRemoved.connect (sigc::mem_fun (*this, &Editor::region_view_removed));
        }
 

-       _routes->routes_added (new_views);
-       _summary->routes_added (new_views);
+       if (new_views.size() > 0) {
+               _routes->routes_added (new_views);
+               _summary->routes_added (new_views);
+       }

 
        if (show_editor_mixer_when_tracks_arrive) {
                show_editor_mixer (true);
 
        if (show_editor_mixer_when_tracks_arrive) {
                show_editor_mixer (true);