PVS-Studio warning V571 for Notepad++

void Gripper::doTabReordering(POINT pt)
{
  ...
  else if (_hTab == hTabOld)
  {
    /* delete item on switch between tabs */
    ::SendMessage(_hTab, TCM_DELETEITEM, iItemOld, 0);
  }
  else
  {
    if (_hTab == hTabOld)
    {
      /* delete item on switch between tabs */
      ::SendMessage(_hTab, TCM_DELETEITEM, iItemOld, 0);
    }
  }
  ...
}

This suspicious code was found in Notepad++ project by PVS-Studio static code analyzer.
Warning message is:
V571 Recurring check. The 'if (_hTab == hTabOld)' condition was already verified in line 478.  Notepad++  gripper.cpp  485

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