Log Message:
-----------
Fix memory clobber problem reported by John Hansen: plperl_safe_init()
may expand the Perl stack, therefore we must SPAGAIN to reload the local
stack pointer after calling it. Also a couple other marginal readability
improvements.
Modified Files:
--------------
pgsql/src/pl/plperl:
plperl.c (r1.57 -> r1.58)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/pl/plperl/plperl.c.diff?r1=1.57&r2=1.58)
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