Re: [Libguestfs] [PATCH 4/4] mltools: JSON: unify JSON_parser type with JSON.json_t.

- } else - rv = Val_none; + } + else { + /* Previously we had a special JSON_parser_null value we could + * use here, making the returned type (sort of) an option. + * This is a best effort which is better than crashing / + * throwing an error. + */ + rv = caml_alloc (1, JSON_STRING_TAG); + v = caml_copy_string (""); + Store_field (rv, 0, v); + }