psqlodbc - psqlodbc: Improve the handling of empty_queries.

Log Message:
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Improve the handling of empty_queries.

Modified Files:
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psqlodbc:
connection.c (r1.177 -> r1.178)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/connection.c.diff?r1=1.177&r2=1.178)
version.h (r1.133 -> r1.134)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/version.h.diff?r1=1.133&r2=1.134)