pgsql: Fix display of whole-row Var appearing at the top level of a

Log Message:
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Fix display of whole-row Var appearing at the top level of a SELECT list.
While we normally prefer the notation "foo.*" for a whole-row Var, that does
not work at SELECT top level, because in that context the parser will assume
that what is wanted is to expand the "*" into a list of separate target
columns, yielding behavior different from a whole-row Var.  We have to emit
just "foo" instead in that context.  Per report from Sokolov Yura.

Modified Files:
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    pgsql/src/backend/utils/adt:
        ruleutils.c (r1.212 -> r1.213)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/ruleutils.c.diff?r1=1.212&r2=1.213)