AudioMixer uninitialized simple fields

        t->needs = 0;

        t->volume[0] = UNITY_GAIN;

        t->volume[1] = UNITY_GAIN;

        // no initialization needed

        // t->prevVolume[0]

        // t->prevVolume[1]

        t->volumeInc[0] = 0;

        t->volumeInc[1] = 0;

        t->auxLevel = 0;

        t->auxInc = 0;

        // no initialization needed

        // t->prevAuxLevel

        // t->frameCount

        t->channelCount = 2;

        t->enabled = 0;

        t->format = 16;