PVS-Studio warning V523 for WebRTC

static int16_t CalcSuppressionGain(AecmCore_t * const aecm)
{
  ....
  if (tmp16no1 < aecm->supGain)
  {
    aecm->supGain += (int16_t)((tmp16no1 - aecm->supGain) >> 4);
  } else
  {
    aecm->supGain += (int16_t)((tmp16no1 - aecm->supGain) >> 4);
  }
  ....
}

This suspicious code was found in WebRTC project by PVS-Studio static code analyzer.
Warning message is:
V523 The 'then' statement is equivalent to the 'else' statement. aecm_core.c 1352

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/