fix translate_events bug (#1354)

src/device/events.rs

@@ -95,7 +95,7 @@ fn set_next_event(device: &mut device::Device) {
 pub fn translate_events(device: &mut device::Device, old_count: u64, new_count: u64) {
     for i in device.cpu.events.iter_mut() {
         if i.enabled {
-            i.count = i.count.wrapping_sub(old_count).wrapping_add(new_count);
+            i.count = new_count + i.count.saturating_sub(old_count);
         }
     }
     set_next_event(device);