about pg_proc (column pronamespace)

i all. Looking for a way to change some functions to 'security
definer'. This is only going to happen in some of the schemas.I found
that pg_catalog.pg_proc have a bool column (prosecdef), which contains
if some function is defined as 'security definer'. So good. It also
contains a column named pronamespace, which contains (or should) the
schema.

After this
SELECT distinct pronamespace from pg_catalog.pg_proc;pronamespace
--------------          11        2200       11313     1901391     1901393     1901396     1901397     1901398
1901399

i would say that, in pg_catalog.pg_namespace i should be able to found
the schema for a particular function. But nope:
glyms_f_test=# SELECT * from pg_catalog.pg_namespace ;     nspname       | nspowner |               nspacl
--------------------+----------+-------------------------------------pg_catalog         |       10 |
{postgres=UC/postgres,=U/postgres}pg_toast          |       10 |pg_temp_1          |       10 |pg_toast_temp_1    |
 10 |information_schema |       10 | {postgres=UC/postgres,=U/postgres}
 
[snip]public             |       10 | {postgres=UC/postgres,=UC/postgres}
(15 rows)

Obviously im missing something, i cant find any relation between
pg_proc.pronamespace and pg_namespace.

Im using PG 8.3.5 (Also tested in 8.2.5 with same results)

Any hints?
Thanks!

Gerardo