psqlodbc - psqlodbc: Divide SC_returns_rows() macro into several

Log Message:
-----------
Divide SC_returns_rows() macro into several categories and make SQLResultNumCols(), SQLDescribeCol() or
SQLColAttribute()available for insert/update/delete .. returning statements. 

Modified Files:
--------------
    psqlodbc:
        convert.c (r1.192 -> r1.193)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/convert.c?r1=1.192&r2=1.193)
        execute.c (r1.99 -> r1.100)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/execute.c?r1=1.99&r2=1.100)
        results.c (r1.120 -> r1.121)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/results.c?r1=1.120&r2=1.121)
        statement.c (r1.153 -> r1.154)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/statement.c?r1=1.153&r2=1.154)
        statement.h (r1.84 -> r1.85)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/statement.h?r1=1.84&r2=1.85)
        version.h (r1.181 -> r1.182)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/version.h?r1=1.181&r2=1.182)