MOUSE_MSC_MAXBUTTON
if (sc->sc_buttons > MOUSE_MSC_MAXBUTTON)
sc->sc_hw.buttons = MOUSE_MSC_MAXBUTTON;
if (sc->sc_buttons > MOUSE_MSC_MAXBUTTON)
sc->sc_hw.buttons = MOUSE_MSC_MAXBUTTON;
if (sc->sc_buttons > MOUSE_MSC_MAXBUTTON)
sc->sc_hw.buttons = MOUSE_MSC_MAXBUTTON;