[MacPorts] #20029: chicken: update to version 4.2.0

[MacPorts]

#20029: chicken: update to version 4.2.0
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 Reporter:  lkraider+ports@…          |       Owner:  arto.bendiken@…        
     Type:  update                    |      Status:  new                    
 Priority:  Normal                    |   Milestone:                         
Component:  ports                     |     Version:                         
 Keywords:                            |        Port:  chicken                
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Comment(by ivan.g.raikov@…):

 I have attached a patch for Chicken 4.3.0. This patch forces 64-bit mode
 on Darwin version 10 (i.e. Snow Leopard). It should still build on systems
 where 32-bit mode is the default.

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Ticket URL: <http://trac.macports.org/ticket/20029#comment:11>
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