pgsql: Fix bug

Log Message:
-----------
Fix bug http://archives.postgresql.org/pgsql-bugs/2006-10/msg00258.php.
Fix string's length calculation for recoding, fix strlower() to avoid wrong
assumption about length of recoded string (was: recoded string is no greater
that source, it may not true for multibyte encodings)
Thanks to Thomas H. <me@alternize.com> and Magnus Hagander <mha@sollentuna.net>

Modified Files:
--------------
    pgsql/contrib/tsearch2:
        dict_ex.c (r1.8 -> r1.9)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/tsearch2/dict_ex.c.diff?r1=1.8&r2=1.9)
        dict_snowball.c (r1.12 -> r1.13)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/tsearch2/dict_snowball.c.diff?r1=1.12&r2=1.13)
        dict_syn.c (r1.9 -> r1.10)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/tsearch2/dict_syn.c.diff?r1=1.9&r2=1.10)
        stopword.c (r1.9 -> r1.10)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/tsearch2/stopword.c.diff?r1=1.9&r2=1.10)
        ts_locale.c (r1.6 -> r1.7)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/tsearch2/ts_locale.c.diff?r1=1.6&r2=1.7)
    pgsql/contrib/tsearch2/ispell:
        spell.c (r1.33 -> r1.34)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/tsearch2/ispell/spell.c.diff?r1=1.33&r2=1.34)