Merge branch 'ZackerySpytz-OCaml-director-ctors'

* ZackerySpytz-OCaml-director-ctors:
  [OCaml] Fix a bug in the ctors of director classes

Lib/ocaml/std_string.i

@@ -70,6 +70,11 @@ class wstring;
   swig_result =	caml_list_append(swig_result,caml_val_string_len((*$1).c_str(), (*$1).size()));
 }
 
+%typemap(directorin) string {
+    swig_result = caml_val_string_len($1.c_str(), $1.size());
+    args = caml_list_append(args, swig_result);
+}
+
 %typemap(directorout) string {
 	$result.assign((char *)caml_ptr_val($input,0), caml_string_len($input));
 }

Lib/ocaml/swig.ml

@@ -44,6 +44,13 @@ let _ = Callback.register "swig_runmethod" invoke
 let fnhelper arg =
   match arg with C_list l -> l | C_void -> [] | _ -> [ arg ]
 
+let director_core_helper fnargs =
+  try
+    match List.hd fnargs with
+      | C_director_core (o,r) -> fnargs
+      | _ -> C_void :: fnargs
+  with Failure _ -> C_void :: fnargs
+
 let rec get_int x = 
   match x with
       C_bool b -> if b then 1 else 0

Lib/ocaml/swig.mli

@@ -30,6 +30,7 @@ exception NoSuchClass of string
 
 val invoke : ('a c_obj_t) -> (string -> 'a c_obj_t -> 'a c_obj_t)
 val fnhelper : 'a c_obj_t -> 'a c_obj_t list
+val director_core_helper : 'a c_obj_t list -> 'a c_obj_t list
 
 val get_int : 'a c_obj_t -> int
 val get_float : 'a c_obj_t -> float