Spin: change speed along with axis at switch time

modes/Spin.cc

@@ -34,6 +34,7 @@ bool Spin::expose (GnomeScreensaver & gs)
             getRandomAxis(&m_monitor_info[i].axis);
             m_monitor_info[i].switch_time = getRandomSwitchTime();
             m_monitor_info[i].last_switch_ticks = gs.getTicks();
+            m_monitor_info[i].speed = getRandomSpeed();
         }
     }