[Patch, objc++, testsuite] fix PR23612

[Janis Johnson]

On Sat, Mar 27, 2010 at 6:09 AM, IainS <developer@sandoe-acoustics.co.uk> wrote:
> the "isa" field is named differently between GNU & NeXT runtimes.
> this patch introduces a new macro in "next-mapping.h" that wraps the
> difference.
> tested on powerpc-apple-darwin9 and ia32 -pc-linux.
>
> testsuite/Changelog:
>
> 2010-03-27  Iain Sandoe  <iain.sandoe@sandoe-acoustics.co.uk>
>
>        PR objc++/23613
>        * gcc/testsuite/objc-obj-c++-shared/next-mapping.h:
>        (CLASSPTRFIELD): New Macro.
>        * gcc/testsuite/obj-c++.dg/isa-field-1.mm: Use new CLASSPTRFIELD
> macro.
>        Remove dg-xfail-if.

This looks fine to me.  Mike?

Janis