Thread: pgsql-server: Fix broken logic for pretty-printing

Log Message:
-----------
Fix broken logic for pretty-printing parenthesis-suppression in UNION
et al.

Modified Files:
--------------
    pgsql-server/src/backend/utils/adt:
        ruleutils.c (r1.174 -> r1.175)

(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/backend/utils/adt/ruleutils.c.diff?r1=1.174&r2=1.175)