[MacPorts] #17551: coin needs updated X11 dependencies

[MacPorts]

#17551: coin needs updated X11 dependencies
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 Reporter:  jeremyhu@…             |       Owner:  css@…           
     Type:  defect                 |      Status:  assigned        
 Priority:  Normal                 |   Milestone:  Port Bugs       
Component:  ports                  |     Version:  1.6.0           
 Keywords:  X11                    |        Port:  Coin            
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Comment(by css@…):

 I might be able to remove doxygen as a default dependency, because it's
 really only used when building the documentation.

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Ticket URL: <http://trac.macports.org/ticket/17551#comment:7>
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