Integrate perlio:
Jarkko Hietaniemi [Thu, 20 Jun 2002 17:41:42 +0000 (17:41 +0000)]
[ 17327]
Fix segv on IO::File->open("/dev/null").
p4raw-link: @17327 on //depot/perlio: a33cf58c90e96ed3c4b1c1fdbaf666d924440940

p4raw-id: //depot/perl@17328


Trivial merge