Simple offline map example array out of index

[cammace]

java.lang.ArrayIndexOutOfBoundsException: length=0; index=-1
    at com.mapbox.mapboxandroiddemo.examples.SimpleOfflineMapActivity$2.onList(SimpleOfflineMapActivity.java:138)
    at com.mapbox.mapboxsdk.offline.OfflineManager$2$1.run(OfflineManager.java:173)
    at android.os.Handler.handleCallback(Handler.java:739)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:148)
    at android.app.ActivityThread.main(ActivityThread.java:5466)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)