wsmouse_hysteresis
if (wsmouse_hysteresis(input, &mt->slots[slot].pos))
int wsmouse_hysteresis(struct wsmouseinput *, struct position *);
if (wsmouse_hysteresis(input, t->pos))
if (!wsmouse_hysteresis(input, t->pos)) {
if (wsmouse_hysteresis(input, pos))