Revert "non-falsy-string cannot be converted to 0"

[VincentLanglet]

This reverts commit f615b1a.

[staabm]

thanks 👍

[VincentLanglet]

Friendly ping @ondrejmirtes

This PR might be forgotten since I assume it's a quick review.
It revert f615b1a as asked in #3980

(int) '00' can still be 0.

[staabm]

(int) '00' can still be 0.

Please add a test for this case so we see it next time earlier

[VincentLanglet]

(int) '00' can still be 0.

Please add a test for this case so we see it next time earlier

How do you want to add such test ?

There is already a test checking that (int) non-falsy-string is an int (and I added a comment).

If I add a test for the special case '00' it will be useless since the methode used will be from ConstantStringType and not AccessoryNonFalsyStringType

[staabm]

I see, thanks for looking into it.

[ondrejmirtes]

Thank you.