psqlodbc - psqlodbc: Suppress some compiler warnings.

Log Message:
-----------
Suppress some compiler warnings.

Modified Files:
--------------
    psqlodbc:
        convert.c (r1.171 -> r1.172)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/convert.c.diff?r1=1.171&r2=1.172)
        descriptor.h (r1.20 -> r1.21)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/descriptor.h.diff?r1=1.20&r2=1.21)
        options.c (r1.75 -> r1.76)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/options.c.diff?r1=1.75&r2=1.76)
        parse.c (r1.69 -> r1.70)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/parse.c.diff?r1=1.69&r2=1.70)
        pgapi30.c (r1.45 -> r1.46)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/pgapi30.c.diff?r1=1.45&r2=1.46)
        socket.c (r1.64 -> r1.65)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/socket.c.diff?r1=1.64&r2=1.65)