PVS-Studio warning V517 for Chromium

WebRtc_Word32 ModuleFileUtility::UpdateWavHeader(OutStream& wav)
{
  ...
  if(STR_CASE_CMP(codec_info_.plname, "L16") == 0)
  {
     res = WriteWavHeader(wav, codec_info_.plfreq, 2, channels,
                         kWaveFormatPcm, _bytesWritten);
  }
  else if(STR_CASE_CMP(codec_info_.plname, "PCMU") == 0) <<<---
  {
     res = WriteWavHeader(wav, 8000, 1, channels,
                          kWaveFormatMuLaw, _bytesWritten);
  }
  else if(STR_CASE_CMP(codec_info_.plname, "PCMU") == 0) <<<---
  {
     res = WriteWavHeader(wav, 8000, 1, channels,
                          kWaveFormatALaw, _bytesWritten);
  } else {
    return 0;
  }
  return res;
}

This suspicious code was found in Chromium project by PVS-Studio static code analyzer.
Warning message is:
V517 The use of 'if (A) {...} else if (A) {...}' pattern was detected. There is a probability of logical error presence. Check lines: 1324, 1327. media_file media_file_utility.cc 1324

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