pgsql: Thank you for applying patch --- regexp_replace.

Log Message:
-----------
Thank you for applying patch --- regexp_replace.

An attached patch is a small additional improvement.

This patch use appendStringInfoText instead of appendStringInfoString.
There is an overhead of PG_TEXT_GET_STR when appendStringInfoString is
executed by text type. This can be reduced by appendStringInfoText.

Atsushi Ogawa

Modified Files:
--------------
pgsql/src/backend/utils/adt:
varlena.c (r1.129 -> r1.130)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/varlena.c.diff?r1=1.129&r2=1.130)