Log Message:
-----------
plperl was not being quite paranoid enough about detecting 'undef' values
returned by Perl. Per report from Nicolas Addington.
Modified Files:
--------------
pgsql/src/pl/plperl:
plperl.c (r1.65 -> r1.66)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/pl/plperl/plperl.c.diff?r1=1.65&r2=1.66)