[OCaml] Fix a bug in the ctors of director classes

If a class was given the director feature, it was not possible
to use ctors with multiple parameters.

Add director_default_runme.ml (it is based on
director_default_runme.java).

Examples/test-suite/ocaml/director_default_runme.ml

@@ -0,0 +1,25 @@
+open Swig
+open Director_default
+
+let director_default_MyFoo ob meth args =
+  match meth with
+      "Msg" -> (match args with
+                  | C_list [ msg ] -> C_string ("director_default_MyFoo-" ^ (msg as string))
+                  | _ -> raise (Failure "director_default_MyFoo::Msg()"))
+    | _ -> (invoke ob) meth args
+
+let _ =
+  let a = new_derived_object new_Foo (director_default_MyFoo) '(10) in
+  assert (a -> GetMsg () as string = "director_default_MyFoo-default");
+  assert (a -> GetMsg ("boo") as string = "director_default_MyFoo-boo");
+  let f = new_Foo '(10) in
+  assert (f -> GetMsg () as string = "Foo-default");
+  assert (f -> GetMsg ("boo") as string = "Foo-boo");
+
+  let b = new_Bar '(1) in
+  assert (b -> GetMsg () as string = "Bar-default");
+  assert (b -> GetMsg ("boo") as string = "Bar-boo");
+  let b2 = new_Bar '() in
+  assert (b2 -> GetMsg () as string = "Bar-default");
+  assert (b2 -> GetMsg ("boo") as string = "Bar-boo");
+;;