proposal: to_ascii(bytea)

Hello,

Changes related to convert* functions in postgresql 8.3 has impact on
to_ascii function.

Before 8.3 I could do:
postgres=# select to_ascii(convert('Příliš žlutý kůň' using
utf8_to_iso_8859_2),'latin2');
to_ascii
------------------
Prilis zluty kun
(1 row)

but convert_to function return bytea now, and I can't to call it
without unwanted changes in content of translated text.

postgres=# SELECT to_ascii(convert_to('Příliš žlutý kůň',
'latin2')::text,'latin2');
to_ascii
---------------------------------------
P\370\355li\271 \276lut\375 k\371\362
(1 row)

ugly hack for it:
postgres=# create function to_ascii(bytea, name) returns text as
'to_ascii_encname' language internal;
CREATE FUNCTION
postgres=#
postgres=# SELECT to_ascii(convert_to('Příliš žlutý kůň', 'latin2'),'latin2');
to_ascii
------------------
Prilis zluty kun
(1 row)

Regards
Pavel Stehule