Simple window example crashes when pressing mouse button 4 (or 5)

[MarkuBu]

Hi,
I tried the simple_window.rs example and noticed that the application crashes when I press mouse button 4 (or 5. Not sure). This happens in debug and release

I have a Logitech M510 and running Ubuntu 20.04 and the latest master branch

thread 'main' panicked at 'index out of bounds: the len is 9 but the index is 9', /home/markus/.cargo/registry/src/github.com-1ecc6299db9ec823/nannou-0.14.1/src/state.rs:223:13

[mitchmindtree]

Ahh thanks for the issue! It looks like this is the same issue as #337.