pllolcode - pllolcode: Improve string handling in lex scanner by

Log Message:
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Improve string handling in lex scanner by liberally following plpgsql's example
Also fix bug in returning boolean values

Modified Files:
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    pllolcode:
        pllolcode.c (r1.22 -> r1.23)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllolcode/pllolcode/pllolcode.c.diff?r1=1.22&r2=1.23)
        scan.l (r1.25 -> r1.26)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllolcode/pllolcode/scan.l.diff?r1=1.25&r2=1.26)
        testFuncs.sql (r1.4 -> r1.5)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllolcode/pllolcode/testFuncs.sql.diff?r1=1.4&r2=1.5)