PVS-Studio warning V503 for IPP Samples

void lNormalizeVector_32f_P3IM(Ipp32f *vec[3],
                               Ipp32s* mask, Ipp32s len)
{
  Ipp32s  i;
  Ipp32f  norm;

  for(i=0; i<len; i++) {
    if(mask<0) continue;
    norm = 1.0f/sqrt(vec[0][i]*vec[0][i]+
                     vec[1][i]*vec[1][i]+
                     vec[2][i]*vec[2][i]);
    vec[0][i] *= norm; vec[1][i] *= norm; vec[2][i] *= norm;
  }
}

This is what should have been written here: if(mask[i]<0) continue;

This suspicious code was found in IPP Samples project by PVS-Studio static code analyzer.
Warning message is:
V503 This is a nonsensical comparison: pointer < 0. ipprsample ippr_sample.cpp 501

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