/contrib/unixdate: Broke in cvs tip.

I tried to use the unixdate contrib, and got the following:

attack=# \i unixdate.sql
psql:unixdate.sql:21: ERROR:  ProcedureCreate: there is no builtin
function named "-"
psql:unixdate.sql:25: ERROR:  Function 'abstime_datetime(int4)' does
not exist       Unable to identify a function that satisfies the given
argument types       You may need to add explicit typecasts
psql:unixdate.sql:29: ERROR:  ProcedureCreate: there is no builtin
function named "-"
psql:unixdate.sql:33: ERROR:  Function 'reltime_timespan(int4)' does
not exist       Unable to identify a function that satisfies the given
argument types       You may need to add explicit typecasts
attack=# 


Any ideas? (I need SOMETHING that takes a unix timestamp and turns it
to timestamp. )


Thanks!

-- 
Larry Rosenman                     http://www.lerctr.org/~ler
Phone: +1 972-414-9812                 E-Mail: ler@lerctr.org
US Mail: 1905 Steamboat Springs Drive, Garland, TX 75044-6749