Log Message:
-----------
Fix regression tests for PL/pgSQL error message changes
Modified Files:
--------------
pgsql/src/test/regress/expected:
plpgsql.out (r1.56 -> r1.57)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/plpgsql.out.diff?r1=1.56&r2=1.57)