Fix PR41268 (and possibly bootstrap on ia64-hpux)

[Michael Matz]

Hi,

On Tue, 8 Sep 2009, Steve Ellcey wrote:

> > Trick question: What type do you assume would entities named 
> > SUBREG_PROMOTED_UNSIGNED_P() or unsignedp have?
> 
> Signed/unsigned. True/False.  So limiting, expand your horizons.  :-)

I was confused by that limiting finite logic, now I asked Alice, she
knew ...

> > In any case, I'll apply this once regstrapping is finished on x86_64-linux 
> 
> The patch looks good to me, I got a good bootstrap using your patch on
> IA64 HP-UX.

... hence r151544 should include the dormouse wisdom.  Ahem :-)


Feeling funny,
Michael.