[Ada] Fix bogus noreturn warning

[Steven Bosscher]

On Sun, Jun 27, 2010 at 3:15 PM, Eric Botcazou <ebotcazou@adacore.com> wrote:
>> Your change moves us further away from the way things should be. I hope you
>> agree with that?
>
> No, I don't, I haven't "broken" anything that wasn't already "broken".

Dude, breath in, breath out, breath in, breath out, and relax! :-)

I am not saying you broke anything!

I am just saying that, ideally, in a perfect world, you would not
*have* to include tree-flow.h.

If you don't agree with that, also fine. But please don't feel so
attacked for no reason.

Ciao!
Steven