[Bugs] #4404 Jukebox NORM: Fails if the stream is not available

[Sugar Labs Bugs]

#4404: Fails if the stream is not available
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    Reporter:  humitos      |          Owner:  humitos    
        Type:  defect       |         Status:  new        
    Priority:  Normal       |      Milestone:  1.0        
   Component:  Jukebox      |        Version:  Unspecified
    Severity:  Unspecified  |       Keywords:             
Distribution:  Unspecified  |   Status_field:  Unconfirmed
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 Steps to reproduce it:

  1. Open Jukebox
  1. Add a stream from the Journal
  1. Add another stream from a Pen Drive
  1. Add another stream from the Journal
  1. Remove the Pen Drive
  1. Play the first stream (added from the Journal)
  1. Seek up to the final position

 Issue:

 When it finishes, Jukebox shows an error log in its log.

 Expected behaviour:

 Continue with the next stream available in the playlist.

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Ticket URL: <http://bugs.sugarlabs.org/ticket/4404>
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