PVS-Studio warning V617 for ResizableLib

#define PSP_HIDEHEADER 0x00000800

BOOL CResizablePageEx::NeedsRefresh(....)
{
  if (m_psp.dwFlags | PSP_HIDEHEADER)
    return TRUE;
  ....
}

This suspicious code was found in ResizableLib project by PVS-Studio static code analyzer.
Warning message is:
V617 Consider inspecting the condition. The '0x00000800' argument of the '|' bitwise operation contains a non-zero value. resizablepageex.cpp 88

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