Fix song path not escaped while loading.

Assets/Cryville/Crtr/Event/ChartHandler.cs

@@ -1,4 +1,5 @@
 using Cryville.Audio.Source.Libav;
+using Cryville.Common;
 using System.Collections.Generic;
 using System.IO;
 
@@ -26,7 +27,7 @@ namespace Cryville.Crtr.Event {
 				else if (ev.Unstamped == null) { }
 				else if (ev.Unstamped is Chart.Sound) {
 					Chart.Sound tev = (Chart.Sound)ev.Unstamped;
-					var dir = new DirectoryInfo(Path.Combine(Game.GameDataPath, "songs", tev.id));
+					var dir = new DirectoryInfo(Path.Combine(Game.GameDataPath, "songs", StringUtils.EscapeFileName(tev.id)));
 					var files = dir.GetFiles();
 					var source = new LibavFileAudioSource(files[0].FullName);
 					source.SelectStream();