pgsql: Fixing and improve compound word support.

Log Message:
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Fixing and improve compound word support. This changes cannot be applied to
previous version iwthout recreating tsvector fields...

Thanks to Alexander Presber <aljoscha@weisshuhn.de> to discover a problem.

Modified Files:
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    pgsql/contrib/tsearch2/ispell:
        spell.c (r1.28 -> r1.29)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/tsearch2/ispell/spell.c.diff?r1=1.28&r2=1.29)