Integrate:

Integrate:
[ 24148]
Subject: [PATCH] const-eight.diff
Message-ID: <20050330174024.GA12167@petdance.com>

[ 24178]
Don't try to export symbols that don't exist

Change #24148 added Perl_rvpv_dup() to the public API, but it is only
defined when USE_ITHREADS is defined.  Adjust makedef.pl accordingly
to keep Win32 happy.
p4raw-link: @24178 on //depot/perl: aeef272316a199aeddb8b9a9713adffbef5806b1
p4raw-link: @24148 on //depot/perl: 6867be6d47d7be8fc56705e4b65f064d3eef92b7

p4raw-id: //depot/maint-5.8/perl@25438
p4raw-integrated: from //depot/perl@24178 'merge in' makedef.pl
	(@23780..)
p4raw-integrated: from //depot/perl@24148 'edit in' universal.c
	(@24074..) op.c (@24096..) dump.c (@24106..) 'merge in'
	xsutils.c (@24074..) doio.c (@24092..) perl.c (@24094..)
	embed.fnc (@24095..) mg.c (@24096..) sv.c (@24109..) embed.h
	global.sym proto.h (@24121..) Porting/Maintainers.pl (@24133..)