bug#6256: 24.0.50; read-event in `repeat' command

[Drew Adams]

> If you have a mouse that scrolls horizontally also it comes 
> as mouse 6 and 7. 
>   So extra buttons in that case would be 8, 9, 10 and so on.  
> This makes it hard do make code that uses extra buttons,
> there is no unique button numbering between different
> mouses except 1-5.

Correction: except 1-3, not 1-5 (or is it even just 1-2?).

mouse-4 and mouse-5 on Windows are the 4th and 5th mouse buttons (crazy!, I
know), while on GNU they represent wheel actions.

But apparently there's not much that Emacs can do about this.
(Did I understand that correctly?)