PVS-Studio warning V595 for IPP Samples

Status AVSEncFusionCore::Init(Ipp32u numThreads,
                              BaseCodecParams *pParams)
{
  m_pAVSCompressorParams =
    DynamicCast<AVSVideoEncoderParams> (pParams);
  ...
  m_qp = m_pAVSCompressorParams->m_iConstQuant;

  // check error(s)
  if (NULL == m_pAVSCompressorParams)
    return UMC_ERR_NULL_PTR;
  ...
}

This suspicious code was found in IPP Samples project by PVS-Studio static code analyzer.
Warning message is:
V595 The 'm_pAVSCompressorParams' pointer was utilized before it was verified against nullptr. Check lines: 88, 91. avs_enc umc_avs_enc_fusion_core.cpp 88

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