MR_LdSpanArrayGet
MR_LdSpanArrayGet(u_int32_t ld, u_int32_t span,
arRef = MR_LdSpanArrayGet(ld, span, drv_map);
arRef = MR_LdSpanArrayGet(ld, span, map);
MR_LdSpanArrayGet(u_int32_t ld, u_int32_t span,
arRef = MR_LdSpanArrayGet(ld, span, map);