PVS-Studio warning V617 for MTASA

#define D3DCLEAR_ZBUFFER 0x00000002l

HRESULT CProxyDirect3DDevice9::Clear(....)
{
  if ( Flags | D3DCLEAR_ZBUFFER )
    CGraphics::GetSingleton().
      GetRenderItemManager ()->SaveReadableDepthBuffer();
  ....
}

This suspicious code was found in MTASA project by PVS-Studio static code analyzer.
Warning message is:
V617 Consider inspecting the condition. The '0x00000002l' argument of the '|' bitwise operation contains a non-zero value. cproxydirect3ddevice9.cpp 520

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