textsearch-ja - textsearch_senna: Revert wrong codes for 9.1 support.

Log Message:
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Revert wrong codes for 9.1 support.

Modified Files:
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textsearch_senna:
textsearch_senna.c (r1.19 -> r1.20)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/textsearch-ja/textsearch_senna/textsearch_senna.c?r1=1.19&r2=1.20)
textsearch_senna/msvc:
textsearch_senna.2010.vcxproj (r1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/textsearch-ja/textsearch_senna/msvc/textsearch_senna.2010.vcxproj?r1=1.1&r2=1.2)
textsearch_senna.2010.vcxproj.filters (r1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/textsearch-ja/textsearch_senna/msvc/textsearch_senna.2010.vcxproj.filters?r1=1.1&r2=1.2)