Merge "Race-condition in SoundPool during release"

    SoundPool *ap = MusterSoundPool(env, thiz);

    if (ap != NULL) {

        // release weak reference

        // release weak reference and clear callback

        jobject weakRef = (jobject) ap->getUserData();

        ap->setCallback(NULL, NULL);

        if (weakRef != NULL) {

            env->DeleteGlobalRef(weakRef);

        }

        // clear callback and native context

        ap->setCallback(NULL, NULL);

        // clear native context

        env->SetLongField(thiz, fields.mNativeContext, 0);

        delete ap;

    }