ShowTts configuration seems to be ignored

[kozec]

Hello,

I've tried to use code from README only to find that it crashes when trying to initialize TTS engine. To workaround this, I've used custom config with ShowTts option disabled:

            val folioReader = FolioReader.getInstance(applicationContext)
            var config = Config().setShowTts(false)
            folioReader.setConfig(config, true)
            folioReader.openBook(R.raw.test)

Despite this, library still tries to create TTS engine (not quite possible on eBook reader with no speakers) and crashes:

08-11 21:33:48.190 6187-6187/package E/AndroidRuntime: FATAL EXCEPTION: main
    java.lang.NullPointerException
        at com.folioreader.ui.folio.mediaoverlay.MediaController$2.onInit(MediaController.java:113)
        at android.speech.tts.TextToSpeech.dispatchOnInit(TextToSpeech.java:640)
        at android.speech.tts.TextToSpeech.initTts(TextToSpeech.java:619)
        at android.speech.tts.TextToSpeech.<init>(TextToSpeech.java:553)
        at android.speech.tts.TextToSpeech.<init>(TextToSpeech.java:527)
        at android.speech.tts.TextToSpeech.<init>(TextToSpeech.java:512)
        at com.folioreader.ui.folio.mediaoverlay.MediaController.setTextToSpeech(MediaController.java:105)
        at com.folioreader.ui.folio.fragment.FolioPageFragment.onCreateView(FolioPageFragment.java:188)
        at android.support.v4.app.Fragment.performCreateView(Fragment.java:2346)
        at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1428)
        at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1759)
        at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1827)
        at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:797)
        at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2596)
        at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2383)
        at android.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2338)
        at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:2215)
        at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:649)
        at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:167)
        at com.folioreader.view.DirectionalViewpager.populate(DirectionalViewpager.java:1327)
        at com.folioreader.view.DirectionalViewpager.populate(DirectionalViewpager.java:1105)
        at com.folioreader.view.DirectionalViewpager.setAdapter(DirectionalViewpager.java:501)
        at com.folioreader.ui.folio.activity.FolioActivity.configFolio(FolioActivity.java:388)
        at com.folioreader.ui.folio.activity.FolioActivity.onLoadPublication(FolioActivity.java:339)
        at com.folioreader.ui.folio.presenter.MainPresenter.onReceivePublication(MainPresenter.java:25)
        at com.folioreader.ui.base.ManifestTask.onPostExecute(ManifestTask.java:68)
        at com.folioreader.ui.base.ManifestTask.onPostExecute(ManifestTask.java:26)
        at android.os.AsyncTask.finish(AsyncTask.java:631)
        at android.os.AsyncTask.access$600(AsyncTask.java:177)
        at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:137)
        at android.app.ActivityThread.main(ActivityThread.java:5041)
        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:793)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
        at dalvik.system.NativeStart.main(Native Method)