psql: \dg off by one error

Hi all,

I noticed an off by one error in psql's verbose-mode display for \dg
and \du. In verbose mode, \dg and \du will not display the
"Replication" attribute:

test=# \dg rep
List of roles
Role name | Attributes | Member of
-----------+-------------+-----------
rep | Replication | {}

test=# \dg+ rep
List of roles
Role name | Attributes | Member of | Description
-----------+------------+-----------+-------------
rep | | {} |

Attached is a one line patch to fix.

Josh