/*
 *  call-seq:
 *     fis.size -> int
 *     
 *  Return the number of fields in the FieldInfos object.
 */
static VALUE
frt_fis_size(VALUE self)
{
    FieldInfos *fis = (FieldInfos *)DATA_PTR(self);
    return INT2FIX(fis->size);
}