Thread: pgsql-server: Support assignment to whole-row variables in plpgsql; also

Log Message:
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Support assignment to whole-row variables in plpgsql; also fix glitch
with using a trigger's NEW or OLD record as a whole-row variable in an
expression.  Fixes several long-standing complaints.

Modified Files:
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    pgsql-server/src/pl/plpgsql/src:
        gram.y (r1.55 -> r1.56)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/pl/plpgsql/src/gram.y.diff?r1=1.55&r2=1.56)
        pl_exec.c (r1.103 -> r1.104)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/pl/plpgsql/src/pl_exec.c.diff?r1=1.103&r2=1.104)