PVS-Studio warning V523 for Notepad++

void TabBarPlus::drawItem(
  DRAWITEMSTRUCT *pDrawItemStruct)
{
  ...

  if (!_isVertical)
    Flags |= DT_BOTTOM;
  else
    Flags |= DT_BOTTOM;
  ...
}

Most likely this is what should be written here: Flags |= DT_VCENTER;

This suspicious code was found in Notepad++ project by PVS-Studio static code analyzer.
Warning message is:
V523 The 'then' statement is equivalent to the 'else' statement

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/