[Bugs] #1590 UNSP: Make timestamp retrieval in Journal more robust

[Sugar Labs Bugs]

#1590: Make timestamp retrieval in Journal more robust
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    Reporter:  sayamindu                  |          Owner:  tomeu                      
        Type:  defect                     |         Status:  new                        
    Priority:  Unspecified by Maintainer  |      Milestone:  Unspecified by Release Team
   Component:  sugar                      |        Version:  Unspecified                
    Severity:  Unspecified                |       Keywords:                             
Distribution:  Unspecified                |   Status_field:  Unconfirmed                
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 The timestamp retrieval code in the journal expects the data to be int,
 however, sometimes it is not. The attached patch tries to fix that.

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Ticket URL: <http://bugs.sugarlabs.org/ticket/1590>
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