Union in Delphi

[Sinspin]

Code:

struct SDK_GPSConfig
{
    SDK_HDRINFO size;
    SDK_HDRINFO version;

    const SDK_WCHAR_T* pDeviceName;
    const SDK_WCHAR_T* pSimFileName;
    const SDK_WCHAR_T* pLogFileName;
    SDK_INT4 LogFileFormat;
    SDK_INT4 baudRate;
    SDK_UINT4 flags;
    SDK_BOOL readOnly;
    SDK_BOOL GNSTMCDevice;
    const SDK_WCHAR_T* pDeviceName2;
    const SDK_WCHAR_T* pSimFileName2;
    const SDK_WCHAR_T* pLogFileName2;
    SDK_INT4 minDirVelo;
    union {
    SDK_BOOL m_bCalcMissing;
    SDK_BOOL bCalcMissing;
    };
    SDK_BOOL shortTimeExtrapolator;
    SDK_BOOL useLocationDirectly;
};

Hat sich mal jemand angesehen was im Union eigentlich steht?
Wenn das Orginal ist macht das ja nichtmal Sinn.