pgsql: Make GIN opclass worked with intarray extensions

Log Message:
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Make GIN opclass worked with intarray extensions

Modified Files:
--------------
    pgsql/contrib/intarray:
        Makefile (r1.13 -> r1.14)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/intarray/Makefile.diff?r1=1.13&r2=1.14)
        _int.h (r1.8 -> r1.9)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/intarray/_int.h.diff?r1=1.8&r2=1.9)
        _int.sql.in (r1.20 -> r1.21)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/intarray/_int.sql.in.diff?r1=1.20&r2=1.21)
        _int_bool.c (r1.6 -> r1.7)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/intarray/_int_bool.c.diff?r1=1.6&r2=1.7)
        uninstall__int.sql (r1.2 -> r1.3)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/intarray/uninstall__int.sql.diff?r1=1.2&r2=1.3)
    pgsql/contrib/intarray/expected:
        _int.out (r1.16 -> r1.17)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/intarray/expected/_int.out.diff?r1=1.16&r2=1.17)
    pgsql/contrib/intarray/sql:
        _int.sql (r1.8 -> r1.9)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/intarray/sql/_int.sql.diff?r1=1.8&r2=1.9)

Added Files:
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    pgsql/contrib/intarray:
        _int_gin.c (r1.1)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/intarray/_int_gin.c?rev=1.1&content-type=text/x-cvsweb-markup)