[bug] reference adapter out of bounds condition

[asksven]

java.lang.RuntimeException: Error receiving broadcast Intent { act=com.asksven.betterbatterystats.REF_UPDATED flg=0x10 (has extras) } in com.asksven.betterbatterystats.StatsActivity$2@41cb8e00
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:768)
at android.os.Handler.handleCallback(Handler.java:725)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5226)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:251)
at java.util.ArrayList.get(ArrayList.java:304)
at com.asksven.betterbatterystats.adapters.ReferencesAdapter.getItem(ReferencesAdapter.java:116)
at com.asksven.betterbatterystats.adapters.ReferencesAdapter.getItem(ReferencesAdapter.java:1)
at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:390)
at android.widget.ArrayAdapter.getView(ArrayAdapter.java:362)
at android.widget.Spinner.makeAndAddView(Spinner.java:546)
at android.widget.Spinner.layout(Spinner.java:495)
at android.widget.AbsSpinner.setSelectionInt(AbsSpinner.java:297)
at android.widget.AbsSpinner.setSelection(AbsSpinner.java:274)
at com.asksven.betterbatterystats.StatsActivity.refreshSpinners(StatsActivity.java:908)
at com.asksven.betterbatterystats.StatsActivity.access$6(StatsActivity.java:896)
at com.asksven.betterbatterystats.StatsActivity$2.onReceive(StatsActivity.java:473)
at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:758)
... 9 more