'libevdev.Device.events' method returns bogus events when evdev device disappears.

evdev devices come and go... but this is not treated correctly in libevdev.Device.events method.

How to reproduce

1. Connect device (I'm testing with a bluetooth keyboard)

2. Device node is created /dev/input/eventX

3. In a terminal launch this python program

    import libevdev
   
    fd = open("/dev/input/eventX", "rb")
    ctx = libevdev.Device(fd)
   
    while True:
        for e in ctx.events():
            print(e)

4. Disconnect device (I just turn bt keyboard off)

5. Device node /dev/input/eventX disappears.

6. Your terminal will be flooded by bogus InputEvent(EV_SYN, SYN_REPORT, 0) events.

I can provide a MR.