Integrate from maint:

Integrate from maint:
[ 19738]
Subject: Re: [PATCH: maint @ 19733] CL compiler warnings on MSWin32
From: "Marcus Holland-Moritz" <mhx-perl@gmx.net>
Message-ID: <011701c32f8c$62d85ee0$0c2f1fac@R2D2>
p4raw-link: @19738 on //depot/perl: 5a1dd2ab5c9ca51eda95e7e0025702bdfcd91d9fon //depot/maint-5.8/perl: c43a4d73e4c3d92928dd743544b60e43ce02ee9c

p4raw-id: //depot/perl@19739
p4raw-integrated: from //depot/maint-5.8/perl@19738 'copy in'
	ext/Encode/encengine.c (@18665..) ext/List/Util/Util.xs
	(@18791..) ext/Storable/Storable.xs (@19551..)
	ext/POSIX/POSIX.xs (@19704..) ext/threads/threads.xs (@19722..)
	'merge in' ext/Thread/Thread.xs (@18145..) pp.h (@19400..) sv.c
	(@19653..) perl.c (@19704..) op.c (@19732..)