From 5bc8750f73c7b4f4d4fe2c15831862c2bfd8250a Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Sat, 28 Dec 2013 16:15:00 +0100
Subject: [PATCH] prevent 0-pointer dereference in editor_routes.cc - fixes
 #5794

---
 gtk2_ardour/editor.cc | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/gtk2_ardour/editor.cc b/gtk2_ardour/editor.cc
index cf3eab5724..faa2a0cf56 100644
--- 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));
 	}
 
-	_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);