From ab024ff6eff0b5dceff800189b1ad9f3f7a546f8 Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Wed, 9 Apr 2014 11:35:21 +0100
Subject: Fix crash when there is no audio MXF.

---
 src/lib/writer.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/lib/writer.cc b/src/lib/writer.cc
index 8508a0716..b8b366426 100644
--- a/src/lib/writer.cc
+++ b/src/lib/writer.cc
@@ -431,7 +431,9 @@ Writer::finish ()
 		reel->add (shared_ptr<dcp::ReelPictureAsset> (new dcp::ReelStereoPictureAsset (stereo, 0)));
 	}
 
-	reel->add (shared_ptr<dcp::ReelSoundAsset> (new dcp::ReelSoundAsset (_sound_mxf, 0)));
+	if (_sound_mxf) {
+		reel->add (shared_ptr<dcp::ReelSoundAsset> (new dcp::ReelSoundAsset (_sound_mxf, 0)));
+	}
 	
 	cpl->add (reel);
 
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