[patch] std::unique_ptr<T[], D> improvements

[Lawrence Crowl]

On 1/1/13, Geoffrey Romer <gromer@google.com> wrote:
> AFAICT there's no way to distinguish between safe and unsafe
> conversions of user-defined pointers, because that's a property
> of the pointer implementation, not the type itself. My PR errs on
> the side of trusting the implementation to provide only correct
> conversions. As Jonathan notes, Howard has objected to that part
> of the PR, so it's possible the eventual resolution will differ
> in that respect; I intend to pick up that discussion next week
> when I'm back from vacation.

BTW, I've attached my latest set of tests.

-- 
Lawrence Crowl
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