Log Message:
-----------
In case the connection magically disappears libecpg only returns an internal
error sqlstate. This change makes it return a correct value..

Modified Files:
--------------
    pgsql/src/interfaces/ecpg/ecpglib:
        error.c (r1.23 -> r1.24)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/ecpglib/error.c?r1=1.23&r2=1.24)
    pgsql/src/interfaces/ecpg/test/expected:
        compat_informix-test_informix.stderr (r1.17 -> r1.18)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/compat_informix-test_informix.stderr?r1=1.17&r2=1.18)
        preproc-whenever.stderr (r1.11 -> r1.12)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/preproc-whenever.stderr?r1=1.11&r2=1.12)
        sql-fetch.stderr (r1.11 -> r1.12)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/sql-fetch.stderr?r1=1.11&r2=1.12)

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