PVS-Studio warning V557 for irrlicht

struct SPCXHeader {
  ...
  u8   Palette[48];
  u8   Reserved;
  u8   Planes;
  u16  BytesPerLine;
  ...
}

IImage* CImageLoaderPCX::loadImage(io::IReadFile* file) const
{
  ...
  for( s32 i=0; i<256; i++ )
  {
    paletteData[i] = (header.Palette[i*3+0] << 16) |
     (header.Palette[i*3+1] << 8) |
     (header.Palette[i*3+2]);
  }
  ...
}

This suspicious code was found in irrlicht project by PVS-Studio static code analyzer.
Warning message is:
V557 Array overrun is possible. The value of 'i * 3 + 0' index could reach 765.  Irrlicht  cimageloaderpcx.cpp  113

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