[Bugs] #395 UNSP: Do not process nil tray

[SugarLabs Bugs]

#395: Do not process nil tray
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    Reporter:  alsroot                    |          Owner:  marcopg    
        Type:  defect                     |         Status:  closed     
    Priority:  Unspecified by Maintainer  |      Milestone:  0.84       
   Component:  sugar-toolkit              |        Version:  0.83.x     
    Severity:  Unspecified                |     Resolution:  fixed      
    Keywords:  r+                         |   Distribution:  Unspecified
Status_field:  Resolved                   |  
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Comment(by tomeu):

 in http://git.sugarlabs.org/projects/sugar-
 toolkit/repos/mainline/commits/ede6db94

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Ticket URL: <http://dev.sugarlabs.org/ticket/395#comment:2>
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