missing entry in g_sCDCDevice struct in usb_dev_serial example code?

In the usb_dev_serial example code for the dk-tm4c129x dev kit, in the file usb_serial_structs.c, there is a definition of a struct variable named g_sCDCDevice.

The type of the variable is tUSBDCDCDevice, which requires 13 members. However, the variable is only initialized with 12 (and in fact there is a comma after the last initializer).

It appears that the intention was to have g_sCDCInstance be the final entry in the struct. Somehow the example still compiles and runs. 

Is there indeed something missing here, or am I not understanding things correctly?

//*****************************************************************************
//
// The CDC device initialization and customization structures. In this case,
// we are using USBBuffers between the CDC device class driver and the
// application code. The function pointers and callback data values are set
// to insert a buffer in each of the data channels, transmit and receive.
//
// With the buffer in place, the CDC channel callback is set to the relevant
// channel function and the callback data is set to point to the channel
// instance data. The buffer, in turn, has its callback set to the application
// function and the callback data set to our CDC instance structure.
//
//*****************************************************************************
tCDCSerInstance g_sCDCInstance;

extern const tUSBBuffer g_sTxBuffer;
extern const tUSBBuffer g_sRxBuffer;

tUSBDCDCDevice g_sCDCDevice =
{
    USB_VID_TI_1CBE,
    USB_PID_SERIAL,
    0,
    USB_CONF_ATTR_SELF_PWR,
    ControlHandler,
    (void *)&g_sCDCDevice,
    USBBufferEventCallback,
    (void *)&g_sRxBuffer,
    USBBufferEventCallback,
    (void *)&g_sTxBuffer,
    g_pui8StringDescriptors,
    NUM_STRING_DESCRIPTORS, 
    // SHOULD BE ONE MORE ENTRY HERE!
};