pgsql: Quick patch to adress a recent concern on the mailing list about

Log Message:
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Quick patch to adress a recent concern on the mailing list
about adding an errant "TO" when we already have a TO. Since
TO cannot be a valid column name (we must quote it), we can
simply ignore the tab-completion if the previous word
was a "TO".

Greg Sabino Mullane

Modified Files:
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pgsql/src/bin/psql:
tab-complete.c (r1.129 -> r1.130)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/tab-complete.c.diff?r1=1.129&r2=1.130)