Fix another crash with no subs.

diff --git a/src/lib/dcp_content.cc b/src/lib/dcp_content.cc
index b77c22714a2a00c48b4509343bae7b86c03cedc7..43b404f6004ac4c554b30eab2f9b162def8491f4 100644 (file)
--- a/src/lib/dcp_content.cc
+++ b/src/lib/dcp_content.cc
@@ -173,7 +173,9 @@ DCPContent::as_xml (xmlpp::Node* node) const
        audio->as_xml (node);
        node->add_child("AudioFrameRate")->add_child_text (raw_convert<string> (audio->stream()->frame_rate()));
        audio->stream()->mapping().as_xml (node->add_child("AudioMapping"));
-       subtitle->as_xml (node);
+       if (subtitle) {
+               subtitle->as_xml (node);
+       }
 
        boost::mutex::scoped_lock lm (_mutex);
        node->add_child("Name")->add_child_text (_name);