[Bug 49309] vbscript:run test fails in Japanese locale

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=49309

--- Comment #1 from Esme Povirk  ---
Testing in Japanese locale on Windows, not every character round-trips
correctly through Chr/Asc, but 255 does. In the string it gets converted to
unicode F8F3, as indicated by AscW(Chr(255)).

I have no idea why it converts to that character, so I don't know how to fix
this properly.

Also, Asc doesn't seem to cause an error for characters it can't convert, it
just returns Asc("?") or negative numbers.