IndexOutOfBoundsException in SourceState.toBundle

[eboudrant]

While integrating Muzei to an app I had this crash, unfortunatly I don't have steps to reproduce. It happend when I was in Muzei app and I was using the next button.

ps: while updating artworks the extension can potentially change the availables custom command (I remove or add commands because we cannot disable/enable them), it is may be related ?
Thanks

E/AndroidRuntime( 8652): java.lang.IndexOutOfBoundsException: Invalid index 3, size is 3
E/AndroidRuntime( 8652):    at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
E/AndroidRuntime( 8652):    at java.util.ArrayList.get(ArrayList.java:308)
E/AndroidRuntime( 8652):    at com.google.android.apps.muzei.api.internal.SourceState.toBundle(SourceState.java:107)
E/AndroidRuntime( 8652):    at com.google.android.apps.muzei.api.MuzeiArtSource.publishCurrentState(MuzeiArtSource.java:696)
E/AndroidRuntime( 8652):    at com.google.android.apps.muzei.api.MuzeiArtSource.publishCurrentState(MuzeiArtSource.java:684)
E/AndroidRuntime( 8652):    at com.google.android.apps.muzei.api.MuzeiArtSource.access$000(MuzeiArtSource.java:190)
E/AndroidRuntime( 8652):    at com.google.android.apps.muzei.api.MuzeiArtSource$1.handleMessage(MuzeiArtSource.java:272)
E/AndroidRuntime( 8652):    at android.os.Handler.dispatchMessage(Handler.java:102)
E/AndroidRuntime( 8652):    at android.os.Looper.loop(Looper.java:136)
E/AndroidRuntime( 8652):    at android.app.ActivityThread.main(ActivityThread.java:5017)
E/AndroidRuntime( 8652):    at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime( 8652):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
E/AndroidRuntime( 8652):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)

[romannurik]

This should be resolved by #37