how to delete access rights from non-existent user ?

Hello,

Now, the problem: (current CVS snapshot)

Suppose, we have user "test" (uid=1000), which has some rights on some table.
Ex.:
Database    = david+----------+-----------------------------+| Relation | Grant/Revoke Permissions
|+----------+-----------------------------+|t        | {"=","postgres=a","test=a"}
|+----------+-----------------------------+

Now, I delete user "test" from database:
david=> drop user test;
DROP USER
david=> \z 
Database    = david+----------+-----------------------------+| Relation | Grant/Revoke Permissions
|+----------+-----------------------------+|t        | {"=","postgres=a","1000=a"}
|+----------+-----------------------------+

david=> revoke all on t from 1000;
ERROR:  parser: parse error at or near "1000"
david=> revoke all on t from '1000';
ERROR:  parser: parse error at or near "'"
david=> revoke all on t from "1000";
ERROR:  aclparse: non-existent user "1000"

Is there way, how to revoke rights from user with uid = 1000 ?
I can create new user with uid = 1000, then revoke rights and drop user,
but this is too complex for me ...
                               thanks for any help,

-- 
* David Sauer, student of Czech Technical University
* electronic mail: davids@orfinet.cz (mime compatible)