psqlodbc - psqlodbc: Fix a compilation error etc when MULTITHREAD

Log Message:
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Fix a compilation error etc when MULTITHREAD support is disabled.

Modified Files:
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psqlodbc:
connection.h (r1.95 -> r1.96)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/connection.h?r1=1.95&r2=1.96)
statement.c (r1.159 -> r1.160)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/statement.c?r1=1.159&r2=1.160)
version.h (r1.214 -> r1.215)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/version.h?r1=1.214&r2=1.215)