pllolcode - pllolcode: Fix memory errors, and make parser return parse

Log Message:
-----------
Fix memory errors, and make parser return parse tree. Also add new tests and
some initial infrastructure for long-term parse tree storage

Modified Files:
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    pllolcode:
        DOC (r1.28 -> r1.29)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllolcode/pllolcode/DOC.diff?r1=1.28&r2=1.29)
        gram.y (r1.33 -> r1.34)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllolcode/pllolcode/gram.y.diff?r1=1.33&r2=1.34)
        pllolcode.c (r1.25 -> r1.26)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllolcode/pllolcode/pllolcode.c.diff?r1=1.25&r2=1.26)
        pllolcode.h (r1.21 -> r1.22)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllolcode/pllolcode/pllolcode.h.diff?r1=1.21&r2=1.22)
        scan.l (r1.26 -> r1.27)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllolcode/pllolcode/scan.l.diff?r1=1.26&r2=1.27)
        testFuncs.sql (r1.5 -> r1.6)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllolcode/pllolcode/testFuncs.sql.diff?r1=1.5&r2=1.6)