Make sound asset language optional.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/sound_asset.h b/src/sound_asset.h
index e58773e4..79edea96 100644
--- a/src/sound_asset.h
+++ b/src/sound_asset.h
@@ -102,7 +102,7 @@ public:
 		return _intrinsic_duration;
 	}
 
-	std::string language () const {
+	boost::optional<std::string> language () const {
 		return _language;
 	}
 
@@ -126,7 +126,7 @@ private:
 	int64_t _intrinsic_duration = 0;
 	int _channels = 0;      ///< number of channels
 	int _sampling_rate = 0; ///< sampling rate in Hz
-	std::string _language;
+	boost::optional<std::string> _language;
 };