PVS-Studio warning V517 for Notepad++

static void ColouriseVHDLDoc(....)
{
  ...
  } else if (sc.Match('-', '-')) {    <<<---
    sc.SetState(SCE_VHDL_COMMENT);
    sc.Forward();
  } else if (sc.Match('-', '-')) {    <<<---
    if (sc.Match("--!"))
      sc.SetState(SCE_VHDL_COMMENTLINEBANG);
    else
      sc.SetState(SCE_VHDL_COMMENT);
  }
  ...
}

This suspicious code was found in Notepad++ project by PVS-Studio static code analyzer.
Warning message is:
V517 The use of 'if (A) {...} else if (A) {...}' pattern was detected. There is a probability of logical error presence. Check lines: 130, 133. lexvhdl.cxx 130

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