pgsql: Changed INFORMIX mode symbol definition yet again because the old

Log Message:
-----------
Changed INFORMIX mode symbol definition yet again because the old way didn't work on NetBSD.

Tags:
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REL8_3_STABLE

Modified Files:
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    pgsql/src/interfaces/ecpg:
        ChangeLog (r1.370.2.1 -> r1.370.2.2)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/ChangeLog?r1=1.370.2.1&r2=1.370.2.2)
    pgsql/src/interfaces/ecpg/include:
        datetime.h (r1.12.4.1 -> r1.12.4.2)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/include/datetime.h?r1=1.12.4.1&r2=1.12.4.2)
        decimal.h (r1.14.4.1 -> r1.14.4.2)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/include/decimal.h?r1=1.14.4.1&r2=1.14.4.2)
        ecpg_informix.h (r1.18.4.1 -> r1.18.4.2)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/include/ecpg_informix.h?r1=1.18.4.1&r2=1.18.4.2)
    pgsql/src/interfaces/ecpg/preproc:
        pgc.l (r1.159.2.2 -> r1.159.2.3)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/preproc/pgc.l?r1=1.159.2.2&r2=1.159.2.3)