Log Message:
-----------
Fix filtered_base_yylex() to save and restore base_yylval and base_yylloc
properly when doing a lookahead.  The lack of this was causing various
interesting misbehaviors when one tries to use "with" as a plain identifier.

Tags:
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REL8_2_STABLE

Modified Files:
--------------
    pgsql/src/backend/parser:
        parser.c (r1.68 -> r1.68.2.1)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/parser.c.diff?r1=1.68&r2=1.68.2.1)

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	Subject: pgsql: Fix filtered_base_yylex() to save and restore base_yylval and