From 5dd3e39f9ef98d82afef240b29506948e038b215 Mon Sep 17 00:00:00 2001
From: Carl Hetherington <carl@carlh.net>
Date: Mon, 14 Mar 2011 18:41:35 +0000
Subject: [PATCH] Fix assert failure when cycle_end is called by
 AudioEngine::set_session before the buffer is set up.

git-svn-id: svn://localhost/ardour2/branches/3.0@9143 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 libs/ardour/audio_port.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libs/ardour/audio_port.cc b/libs/ardour/audio_port.cc
index e01f4a89e6..987d99e25a 100644
--- a/libs/ardour/audio_port.cc
+++ b/libs/ardour/audio_port.cc
@@ -59,7 +59,9 @@ AudioPort::cycle_end (pframes_t nframes)
                 /* we can't use nframes here because the current buffer capacity may 
                    be shorter than the full buffer size if we split the cycle.
                 */
-		_buffer->silence (_buffer->capacity());
+		if (_buffer->capacity () > 0) {
+			_buffer->silence (_buffer->capacity());
+		}
 	}
 }