PVS-Studio warning V598 for SlimDX

template<typename IBaseInterface>
struct TVariable : public IBaseInterface
{
  virtual BOOL IsValid() { .... }
  ....
};

struct SMember :
  public TVariable<TMember<ID3DX11EffectVariable> >
{
};

CEffectVectorOwner<SMember> m_pMemberInterfaces;

HRESULT CEffect::CopyMemberInterfaces( CEffect* pEffectSource )
{
  ....
  ZeroMemory( &m_pMemberInterfaces[i],
              sizeof(SMember) * ( Members - i ) );
  ....
}

This suspicious code was found in SlimDX project by PVS-Studio static code analyzer.
Warning message is:
V598 The 'memset' function is used to nullify the fields of 'SMember' class. Virtual method table will be damaged by this. effectnonruntime.cpp 1739

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