psqlodbc - psqlodbc: Add a missing constant.

Log Message:
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Add a missing constant.

Modified Files:
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psqlodbc:
version.h (r1.211 -> r1.212)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/version.h?r1=1.211&r2=1.212)
pgapifunc.h (r1.27 -> r1.28)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/pgapifunc.h?r1=1.27&r2=1.28)