patch for allegro8 (was: Re: [asdf-devel] Ready to release?)

[Faré]

> For attached file unicode.lisp [...]
So allegro stores the strings in utf-8 (as confirmed by looking at a
trivial fasl), and when a non-latin1 (or cp1252) character is interned
from the fasl in a 8-bit variant, it becomes #\?. That makes sense.

> I'm not sure how to make a latin1 string which is malformed as utf-8.
You just did.

echo 选项 | recode u8..l1 | recode u8..u2
recode: Invalid input in step `UTF-8..ISO-10646-UCS-2'

Thanks a lot! This closes this investigation of strings in allegro.
Can you test that the latest checkout passes the test on mlisp8?

—♯ƒ • François-René ÐVB Rideau •Reflection&Cybernethics• http://fare.tunes.org
The difference between a programmer and a user, is that the programmer
knows there is no difference between using and programming.     — Faré