Changed OverflowError condition of fast ascii converter to >= |HUGE_VAL|

[dhomeier]

Addressing #9694 - if we are right about the fast C converter internally calculating in 80 bit on some architectures like x86_64/gcc 9.2 (see discussion there), this will still raise an OverflowError when the returned value exceeds np.float64 range (and becomes inf).

Fix #9694

[olebole]

This is exactly the change @dhomeier suggested before. I successfully tested this on our i386 architecture. What I did not test yet is whether it does harm on other platforms; however it looks simple enough for me.
I am planning to upload the RC2 plus this patch to Debian experimental later today (CET), so if a definitive confirmation for all our platforms is needed, I can give that only tomorrow.

[hamogu]

This is way beyond my C knowledge, but I don't see how this change could do any harm, so I'm fine with including it since it seems to work.

[pllim]

Okay, let's wait for a follow-up from @olebole before merge.

@bsipocz -- Does this need a change log?

[bsipocz]

@bsipocz -- Does this need a change log?

I feel it's not necessary? 🤷‍♀

[taldcroft]

👍

[bsipocz]

Thanks @dhomeier!

[olebole]

It is already closed, but I just wanted to confirm that this does not harm on our other platforms ;-)