assignment of read-only member `bvAffects

assignment of read-only member `bvAffects

void
init_classes(void)
{
        int i;

        for (i = 1; i < MAX_CLASS ; i++)
        {
                class_table.bvAffects =
                                ext_flag_value(affect_flags,
                                class_table.szAffects); <---This is the line.
        }
}