See <https://listarchives.libreoffice.org/global/users/msg51243.html>
"[libreoffice-users] type byte in Basic", where

> Sub Main
>   dim oOutputStream as variant
>   oOutputStream = createUnoService("com.sun.star.io.SequenceOutputStream")
>   dim nA as byte
>   nA = 195
>   oOutputStream.writeBytes(array(nA))
>   oOutputStream.flush
>   dim back(0) as byte
>   back = oOutputStream.getWrittenBytes
>   MsgBox(back(0))
> End Sub

failed with "Inadmissible value or data type. Overflow." instead of showing
"-61".

Change-Id: I0445476c67510d5f8669a6e711e92332c01ec06c