Fix \dT enum in psql

Folks,

In psql, \dT doesn't show the elements for enums.  Please find patch
vs. CVS TIP attached which fixes this per the following TODO item:

http://archives.postgresql.org/pgsql-hackers/2008-01/msg00826.php

Cheers,
David.
--
David Fetter <david@fetter.org> http://fetter.org/
Phone: +1 415 235 3778  AIM: dfetter666  Yahoo!: dfetter
Skype: davidfetter      XMPP: david.fetter@gmail.com

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