add updateMusicStream + musicSystem

lib/Ray/sources/Audio/Music.cpp

@@ -55,3 +55,9 @@ RAY::Audio::Music &RAY::Audio::Music::setPitch(float pitch)
 	SetMusicPitch(*_music, pitch);
 	return *this;
 }
+
+RAY::Audio::Music &RAY::Audio::Music::updateMusicStream(void)
+{
+	UpdateMusicStream(*_music);
+	return *this;
+}

lib/Ray/sources/Audio/Music.hpp

@@ -51,6 +51,8 @@ namespace RAY::Audio
 			// Set pitch for a Music (1.0 is base level)
 			Music &setPitch(float pitch) override;
 
+			Music &updateMusicStream(void);
+
 		private:
 			std::shared_ptr<::Music> _music;