Fix crash on double-click of show-audio button.

2 files changed, 6 insertions, 6 deletions

diff --git a/src/lib/audio_content.cc b/src/lib/audio_content.cc
index 04823d1e6..97372b962 100644
--- a/src/lib/audio_content.cc
+++ b/src/lib/audio_content.cc
@@ -119,17 +119,17 @@ AudioContent::set_audio_delay (int d)
 	signal_changed (AudioContentProperty::AUDIO_DELAY);
 }
 
-void
+boost::signals2::connection
 AudioContent::analyse_audio (boost::function<void()> finished)
 {
 	shared_ptr<const Film> film = _film.lock ();
-	if (!film) {
-		return;
-	}
+	assert (film);
 	
 	shared_ptr<AnalyseAudioJob> job (new AnalyseAudioJob (film, dynamic_pointer_cast<AudioContent> (shared_from_this())));
-	job->Finished.connect (finished);
+	boost::signals2::connection c = job->Finished.connect (finished);
 	JobManager::instance()->add (job);
+
+	return c;
 }
 
 boost::filesystem::path
diff --git a/src/lib/audio_content.h b/src/lib/audio_content.h
index b100d7aba..ca4a1f234 100644
--- a/src/lib/audio_content.h
+++ b/src/lib/audio_content.h
@@ -58,7 +58,7 @@ public:
 	virtual AudioMapping audio_mapping () const = 0;
 	virtual void set_audio_mapping (AudioMapping) = 0;
 
-	void analyse_audio (boost::function<void()>);
+	boost::signals2::connection analyse_audio (boost::function<void()>);
 	boost::filesystem::path audio_analysis_path () const;
 
 	void set_audio_gain (float);