From f15236b9a03cc7e4a5c3d053bc02ab1811eec159 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Fri, 30 Jan 2015 09:22:59 +0100
Subject: [PATCH] amend 070818f

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

diff --git a/libs/ardour/graph.cc b/libs/ardour/graph.cc
index cc82fb6c53..de2ec802df 100644
--- a/libs/ardour/graph.cc
+++ b/libs/ardour/graph.cc
@@ -485,6 +485,8 @@ Graph::dump (int chain)
 int
 Graph::silent_process_routes (pframes_t nframes, framepos_t start_frame, framepos_t end_frame, bool& need_butler)
 {
+	if (!_threads_active) return 0;
+
         _process_nframes = nframes;
         _process_start_frame = start_frame;
         _process_end_frame = end_frame;
@@ -510,6 +512,8 @@ Graph::process_routes (pframes_t nframes, framepos_t start_frame, framepos_t end
 {
 	DEBUG_TRACE (DEBUG::ProcessThreads, string_compose ("graph execution from %1 to %2 = %3\n", start_frame, end_frame, nframes));
 
+	if (!_threads_active) return 0;
+
         _process_nframes = nframes;
         _process_start_frame = start_frame;
         _process_end_frame = end_frame;