issue #6 fixed!

src/l2lExpandMetaOp.ml

-(** Time-stamp: <modified the 20/02/2017 (at 11:30) by Erwan Jahier> *)
+(** Time-stamp: <modified the 04/07/2018 (at 09:59) by Erwan Jahier> *)
 
 open Lxm
 open Lic
@@ -334,11 +334,12 @@ let (create_map_body: local_ctx -> Lic.static_arg list -> Lic.node_body * var_in
 		    let cl = 
             List.map (fun l -> snd (Lic.var_info_of_left l).var_clock_eff) lhs
           in
+          let p,n = fst iter_node.it in
           let rhs = {
             ve_typ = List.map Lic.type_of_left lhs;
             ve_clk = cl;
-            ve_core = 
-              if AstPredef.is_a_predef_op (snd(fst iter_node.it)) then
+            ve_core =
+              if p="Lustre" && AstPredef.is_a_predef_op n then
                 CallByPosLic({src=lxm;it=(Lic.PREDEF_CALL iter_node)}, xi_j)
               else
                 CallByPosLic({src=lxm;it=(CALL iter_node)}, xi_j);