[Bugs] #3955 sugar UNSP: Speech device icon doesn't autostop

[Sugar Labs Bugs]

#3955: Speech device icon doesn't autostop
------------------------------------------+---------------------------------
    Reporter:  manuq                      |          Owner:  manuq      
        Type:  defect                     |         Status:  new        
    Priority:  Unspecified by Maintainer  |      Milestone:  0.98       
   Component:  sugar                      |        Version:  0.97.x     
    Severity:  Unspecified                |       Keywords:             
Distribution:  Unspecified                |   Status_field:  Unconfirmed
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 The callback for the GstBus 'message' signal [1] is called with None in
 the message.

 [1]
 http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstBus.html
 #GstBus-message

 {{{
 Traceback (most recent call last):
   File "/usr/lib/python2.7/site-packages/jarabe/model/speech.py", line
 176, in __pipe_message_cb
     if message.type == Gst.MessageType.EOS:
 AttributeError: 'NoneType' object has no attribute 'type'
 }}}

 Seen in olpc build os3 for 13.1.0 .

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Ticket URL: <http://bugs.sugarlabs.org/ticket/3955>
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