From 46fe83cfff0d188ec215c8bf5380aa673cb08aa7 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Wed, 8 Mar 2017 17:49:01 +0100
Subject: [PATCH] Prevent adding "master" to a group

---
 libs/ardour/route_group.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libs/ardour/route_group.cc b/libs/ardour/route_group.cc
index 519c88c84f..291806c8cb 100644
--- a/libs/ardour/route_group.cc
+++ b/libs/ardour/route_group.cc
@@ -155,6 +155,10 @@ RouteGroup::~RouteGroup ()
 int
 RouteGroup::add (boost::shared_ptr<Route> r)
 {
+	if (r->is_master()) {
+		return 0;
+	}
+
 	if (find (routes->begin(), routes->end(), r) != routes->end()) {
 		return 0;
 	}