libstdc++/5745: get_temporary_buffer and return_temporary_buffer missing in ext/memory

[Paolo Carlini]

Philipp Thomas wrote:

>But that doesn't fix backward/tempbuf.h (used by algo.h, which is why I
>noticed the failure)!
>
>If tempbuf.h is right in pulling them into global namepace, something like
>this is needed:
>
>2002-02-21  Philipp Thomas  <pthomas@suse.de>
>
>	* include/backward/tempbuf.h: get_temporary_buffer and
>	return_temporary_buffer are in namespace std, not in __gnu_cxx.
>

Yes you are right. I think your patch is almost "obviously correct", but 
wait nevertheless for Benjamin's ack before committing it.

Thanks,
Paolo.