plperlng - plperlng: revert optimization from Abhijit Menon-Sen changed

Log Message:
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revert optimization from Abhijit Menon-Sen
changed plphp error msgs to plperl

Modified Files:
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plperlng:
plperl.c (r1.5 -> r1.6)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plperlng/plperlng/plperl.c.diff?r1=1.5&r2=1.6)