Обсуждение: pgsql: Fix broken {xufailed} production that made HEAD fail on select

Log Message:
-----------
Fix broken {xufailed} production that made HEAD fail on
    select u&42 from table-with-a-u-column;
Also fix missing SET_YYLLOC() in the {dolqfailed} production that I suppose
this was based on.  The latter is a pre-existing bug, but the only effect
is to misplace the error cursor by one token, so probably not worth
backpatching.

Modified Files:
--------------
    pgsql/src/backend/parser:
        scan.l (r1.149 -> r1.150)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/scan.l?r1=1.149&r2=1.150)