Handling of USB reinsertion

Hello again Fabio,

Just another issue thread to talk to you about the handling of the reinsertion of a USB stick that shows this type of message on my machine (win10x86-64) :

Traceback (most recent call last):
File "was.py", line 210, in onDeviceChange
device_scanning.play()
File "C:\Python27\lib\site-packages\pyglet\media__init__.py", line 472, in play
player.queue(self)
File "C:\Python27\lib\site-packages\pyglet\media__init__.py", line 978, in queue
group.queue(source)
File "C:\Python27\lib\site-packages\pyglet\media__init__.py", line 695, in queue
source = source.get_queue_source()
File "C:\Python27\lib\site-packages\pyglet\media__init_.py", line 579, in get_queue_source
raise MediaException('This source is already queued on a player.')
pyglet.media.MediaException: This source is already queued on a player.
Python WNDPROC handler failed
Traceback (most recent call last):
File "was.py", line 210, in onDeviceChange
device_scanning.play()
File "C:\Python27\lib\site-packages\pyglet\media__init_.py", line 472, in play
player.queue(self)
File "C:\Python27\lib\site-packages\pyglet\media__init__.py", line 978, in queue
group.queue(source)
File "C:\Python27\lib\site-packages\pyglet\media__init__.py", line 695, in queue
source = source.get_queue_source()
File "C:\Python27\lib\site-packages\pyglet\media__init_.py", line 579, in _get_queue_source
raise MediaException('This source is already queued on a player.')
pyglet.media.MediaException: This source is already queued on a player.

Cheers !

Loris