pgsql: Ooops, got only one of the two ArrayExpr variants correct in

Log Message:
-----------
Ooops, got only one of the two ArrayExpr variants correct in first
cut at exprTypmod support. Also, experimentation shows that we need
to label the type of Const nodes that are numeric with a specific
typmod.

Modified Files:
--------------
pgsql/src/backend/parser:
parse_expr.c (r1.213 -> r1.214)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/parse_expr.c.diff?r1=1.213&r2=1.214)
pgsql/src/backend/utils/adt:
ruleutils.c (r1.254 -> r1.255)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/ruleutils.c.diff?r1=1.254&r2=1.255)