Fix embedded assets for getMusic

Author: Raltyro

src/openfl/utils/Assets.hx

@@ -323,15 +323,15 @@ class Assets
 		#if (lime_funkin && lime_native)
 		var path = getPath(id);
 		var buffer = AudioBuffer.fromFile(path, true);
-		return Sound.fromAudioBuffer(buffer);
+		if (buffer != null) return Sound.fromAudioBuffer(buffer);
 		#elseif (lime_vorbis && lime > "7.9.0")
 		var path = getPath(id);
 		var vorbisFile = VorbisFile.fromFile(path);
 		var buffer = AudioBuffer.fromVorbisFile(vorbisFile);
-		return Sound.fromAudioBuffer(buffer);
-		#else
-		return getSound(id, useCache);
+		if (buffer != null) return Sound.fromAudioBuffer(buffer);
 		#end
+
+		return getSound(id, useCache);
 	}
 
 	/**