Handle not finding a music player for a song gracefully.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@2389 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/media/sound/SoundManager.java

@@ -1,5 +1,5 @@
 //
-// $Id: SoundManager.java,v 1.58 2003/04/06 04:36:01 mdb Exp $
+// $Id: SoundManager.java,v 1.59 2003/04/08 01:46:16 ray Exp $
 
 package com.threerings.media.sound;
 
@@ -468,6 +468,13 @@ public class SoundManager
 
         Class playerClass = getMusicPlayerClass(music);
 
+        // if we don't have a player for this song, play the next song
+        if (playerClass == null) {
+            _musicStack.removeFirst();
+            playTopMusic();
+            return;
+        }
+
         // shutdown the old player if we're switching music types
         if (! playerClass.isInstance(_musicPlayer)) {
             if (_musicPlayer != null) {