Tidying a few things up.

1 files changed, 8 insertions, 3 deletions

diff --git a/src/reel_smpte_closed_caption_asset.h b/src/reel_smpte_closed_caption_asset.h
index 889ce5f6..8b38d2ad 100644
--- a/src/reel_smpte_closed_caption_asset.h
+++ b/src/reel_smpte_closed_caption_asset.h
@@ -55,12 +55,17 @@ public:
 	ReelSMPTEClosedCaptionAsset (std::shared_ptr<SMPTESubtitleAsset> asset, Fraction edit_rate, int64_t instrinsic_duration, int64_t entry_point);
 	explicit ReelSMPTEClosedCaptionAsset (std::shared_ptr<const cxml::Node>);
 
-	xmlpp::Node* write_to_cpl (xmlpp::Node* node, Standard standard) const override;
+	std::shared_ptr<SMPTESubtitleAsset> smpte_asset () {
+		return asset_of_type<SMPTESubtitleAsset>();
+	}
 
-	std::shared_ptr<SMPTESubtitleAsset> smpte_asset () const {
-		return std::dynamic_pointer_cast<SMPTESubtitleAsset>(asset());
+	std::shared_ptr<const SMPTESubtitleAsset> smpte_asset () const {
+		return asset_of_type<const SMPTESubtitleAsset>();
 	}
 
+	xmlpp::Node* write_to_cpl (xmlpp::Node* node, Standard standard) const override;
+
+
 private:
 	boost::optional<std::string> key_type () const override {
 		return std::string("MDSK");