[Bugs] #638 NORM: "Playwave" example not working: directory not found?

[Sugar Labs Bugs]

#638: "Playwave" example not working: directory not found?
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    Reporter:  sascha_silbe  |          Owner:  lfaraone         
        Type:  defect        |         Status:  new              
    Priority:  Normal        |      Milestone:  0.86             
   Component:  Pippy         |        Version:  Git as of bugdate
    Severity:  Major         |       Keywords:                   
Distribution:  Unspecified   |   Status_field:  Unconfirmed      
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Changes (by jpichon):

 * cc: jpichon (added)


Comment:

 This is happening because PlayWave relies on TamTamEdit to provide the
 sound, which isn't always installed by default.

 The Getsound example works around this by providing a helpful error
 message when finddir() returns None, so I'm attaching a patch to do the
 same for Playwave. Let me know if there would be a better way to deal with
 this.

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Ticket URL: <http://bugs.sugarlabs.org/ticket/638#comment:2>
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