[fixed: 87] extended volume sliders...

I'm working on a skin and I have a circular layer that I've given the "volumelr" attribute. As I hadn't put in a mute button yet, my first instinct when the phone rang was to click and drag quickly to the left... I discovered that if I drag left past the 0% spot, it'll go back up towards 100%. Same goes for the "volumebt" slider as well. Dragging past 100% doesn't make it go back down toward 0% though.