pgsql: pg_column_size() cleanup for messages and code cleanup.

Log Message:
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pg_column_size() cleanup for messages and code cleanup.

Mark Kirkwood

Modified Files:
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pgsql/src/backend/utils/adt:
varlena.c (r1.125 -> r1.126)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/varlena.c.diff?r1=1.125&r2=1.126)