Do not try to render ISMs if there are none to render

    input_ism *pCurrentInput;

    ivas_error error;

#ifdef FIX_BASOP_2436_REUSED_CLDFB_IN_OMASA_SR

    int16_t num_active_inputs;

    IVAS_REND_AudioBuffer work_buffer;

    float tmp_td_binaural[MAX_HEAD_ROT_POSES * BINAURAL_CHANNELS * L_FRAME48k];

    // Early return in case there are no active ISM inputs

    num_active_inputs = 0;

    for ( i = 0, pCurrentInput = hIvasRend->inputsIsm; i < RENDERER_MAX_ISM_INPUTS; ++i, ++pCurrentInput )

    {

        if ( pCurrentInput->base.inConfig != IVAS_AUDIO_CONFIG_INVALID )

        {

            ++num_active_inputs;

        }

    }

    if ( num_active_inputs == 0 )

    {

        return IVAS_ERR_OK;

    }

    // By default (TD output), use outAudio as work_buffer. This means we render individual ISMs

    // directly to outAudio, since the `data` member of both these structs is pointing to the same memory.

    // Initializing this way also fixes MSVC's false-positive warning about work_buffer being used