python - be: Fix errors with some compilers/options.

Log Message:
-----------
Fix errors with some compilers/options.

Don't be so lazy. Some compilers/options see this("(foo->bar)") as an lvalue, so
don't Fetch() in a Fix().

Modified Files:
--------------
    be/include/pypg:
        call.h (r1.6 -> r1.7)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/include/pypg/call.h.diff?r1=1.6&r2=1.7)
        heaptuple.h (r1.6 -> r1.7)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/include/pypg/heaptuple.h.diff?r1=1.6&r2=1.7)
        postgres.h (r1.8 -> r1.9)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/include/pypg/postgres.h.diff?r1=1.8&r2=1.9)
        relation.h (r1.3 -> r1.4)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/include/pypg/relation.h.diff?r1=1.3&r2=1.4)
        tupledesc.h (r1.8 -> r1.9)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/include/pypg/tupledesc.h.diff?r1=1.8&r2=1.9)
    be/include/pypg/call:
        portal.h (r1.5 -> r1.6)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/include/pypg/call/portal.h.diff?r1=1.5&r2=1.6)
        trigger.h (r1.6 -> r1.7)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/include/pypg/call/trigger.h.diff?r1=1.6&r2=1.7)