Log Message:
-----------
Reduce memory requirements for writing CSVlogs, so it will work with about
the same amount of memory in ErrorContext as standard logs.
Modified Files:
--------------
pgsql/src/backend/utils/error:
elog.c (r1.194 -> r1.195)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/error/elog.c?r1=1.194&r2=1.195)