Re: why luaZ_fill discount char being returned

[Roberto Ierusalimschy <roberto@...>]

> luaZ_fill discount the byte ,but luaZ_read put it back; it seems unuseful;
> why code do not write like this:
> 
> [...]
> 
> why need discount and put it back ?

'luaZ_fill' is also used by the macro 'zgetc', which needs that
"discount".

-- Roberto