[Issue 3850] Signed/unsigned bytes type name

[Daniel Kozak]

On Tuesday, 23 October 2012 at 16:32:38 UTC, 
bearophile_hugs at eml.cc wrote:
> And to represent those indexes I used a
> sbyte instead of a ubyte because I have used -1 to represent 
> "missing value").

You still have to use 0xFF :-). But yes, I understand, that sbyte 
and ubyte is better way, how to solve this issue.