plpsm - plpgpsm: allows stacked diagnostics entry for exceptions get

Log Message:
-----------
allows stacked diagnostics entry for exceptions
get stacked diagnostics statement support

Modified Files:
--------------
    plpgpsm/src:
        gram.y (r1.41 -> r1.42)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plpsm/plpgpsm/src/gram.y.diff?r1=1.41&r2=1.42)
        pl_exec.c (r1.42 -> r1.43)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plpsm/plpgpsm/src/pl_exec.c.diff?r1=1.42&r2=1.43)
        pl_funcs.c (r1.8 -> r1.9)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plpsm/plpgpsm/src/pl_funcs.c.diff?r1=1.8&r2=1.9)
        plpgpsm.h (r1.32 -> r1.33)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plpsm/plpgpsm/src/plpgpsm.h.diff?r1=1.32&r2=1.33)
    plpgpsm/src/expected:
        plpgpsm.out (r1.14 -> r1.15)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plpsm/plpgpsm/src/expected/plpgpsm.out.diff?r1=1.14&r2=1.15)
    plpgpsm/src/sql:
        plpgpsm.sql (r1.13 -> r1.14)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plpsm/plpgpsm/src/sql/plpgpsm.sql.diff?r1=1.13&r2=1.14)