PVS-Studio warning V571 for IPP Samples

void rrGetNextBunch_Spiral(....)
{
  int x,y;
  ...
  if(x < 0)
    if(x < 0)  goto _begine;
  ...
  if(y < 0)
    if(y < 0)  goto _begine;
  ...
}

This suspicious code was found in IPP Samples project by PVS-Studio static code analyzer.
Warning message is:
V571 Recurring check. The 'if (x < 0)' condition was already verified in line 1025. 3d-viewer rrdemosupport.cpp 1026

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