Generate pointer types for C unions

[jarroddavis68]

What changes need to be made so that PsfEvent is created for a union such as:

typedef union
{
    sfEventType             type;             ///< Type of the event
    sfSizeEvent             size;             ///< Size event parameters
    sfKeyEvent              key;              ///< Key event parameters
    sfTextEvent             text;             ///< Text event parameters
    sfMouseMoveEvent        mouseMove;        ///< Mouse move event parameters
    sfMouseButtonEvent      mouseButton;      ///< Mouse button event parameters
    sfMouseWheelEvent       mouseWheel;       ///< Mouse wheel event parameters (deprecated)
    sfMouseWheelScrollEvent mouseWheelScroll; ///< Mouse wheel event parameters
    sfJoystickMoveEvent     joystickMove;     ///< Joystick move event parameters
    sfJoystickButtonEvent   joystickButton;   ///< Joystick button event parameters
    sfJoystickConnectEvent  joystickConnect;  ///< Joystick (dis)connect event parameters
    sfTouchEvent            touch;            ///< Touch events parameters
    sfSensorEvent           sensor;           ///< Sensor event parameters
} sfEvent;

If it was a struct, the pointer type is created.