PVS-Studio warning V547 for ReactOS

BOOL APIENTRY IntUseFontOutlinesW(....)
{
  ...
  if (GetGlyphOutline(hDC, glyphIndex, GGO_NATIVE,
       &glyphMetrics, glyphBufSize, glyphBuf, &matrix) < 0)
  {
    HeapFree(GetProcessHeap(), 0, glyphBuf);
    return FALSE; /*WGL_STATUS_FAILURE*/
  }
  ...
}

This suspicious code was found in ReactOS project by PVS-Studio static code analyzer.
Warning message is:
V547 Expression is always false. Unsigned type value is never < 0. opengl32 font.c 1099

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/