From df13a8c0b12c287cef7210f7cf98af9df6991c82 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Tue, 15 Oct 2013 12:48:58 -0400
Subject: [PATCH] fix crash when opening audio/MIDI setup while playing etc.

---
 gtk2_ardour/engine_dialog.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gtk2_ardour/engine_dialog.cc b/gtk2_ardour/engine_dialog.cc
index d20cbd3da9..aff1e22508 100644
--- a/gtk2_ardour/engine_dialog.cc
+++ b/gtk2_ardour/engine_dialog.cc
@@ -1619,7 +1619,9 @@ EngineControl::EngineControl ()
 		 enable_latency_tab ();
 
 	 } else {
-		 ARDOUR::AudioEngine::instance()->stop_latency_detection();
+		 if (lm_running) {
+			 ARDOUR::AudioEngine::instance()->stop_latency_detection();
+		 }
 	 }
  }