PVS-Studio warning V519 for Source SDK

void GetFPSColor( int nFps, unsigned char ucColor[3] )
{
  ....
  int nFPSThreshold1 = 20;
  int nFPSThreshold2 = 15;

  if (IsPC() &&
      g_pMaterialSystemHardwareConfig->GetDXSupportLevel() >= 95)
  {
    nFPSThreshold1 = 60;
    nFPSThreshold1 = 50;
  }
  ....
}

This suspicious code was found in Source SDK project by PVS-Studio static code analyzer.
Warning message is:
V519 The 'nFPSThreshold1' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 191, 192. Client (HL2) vgui_fpspanel.cpp 192

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