NOTICE: _outNode: don't know how to print type 715

Hi all,

PostgreSQL gives me a strange message when I try to create a table
with a NOT NULL column.


drop table prova;
DROP
create table prova(
        campo1          INTEGER
        );
CREATE

drop table prova;
DROP
create table prova(
        campo1          INTEGER NOT NULL
        );
NOTICE:  _outNode: don't know how to print type 715
CREATE
\d prova

Table    = prova
+---------------------------+----------------------------------+-------+
|       Field               |              Type                | Length|
+---------------------------+----------------------------------+-------+
| campo1                    | int4 not null                    |     4 |
+---------------------------+----------------------------------+-------+

Does someone knows what that message means ?

                    Thank you,
                      Jose'