[MacPorts] #34312: missing dependency for viking package

[MacPorts]

#34312: missing dependency for viking package
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 Reporter:  nikoperugia@…            |       Owner:  macports-tickets@…                   
     Type:  defect                   |      Status:  new                                  
 Priority:  Normal                   |   Milestone:                                       
Component:  ports                    |     Version:  2.0.4                                
 Keywords:                           |        Port:  vicking                              
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 vicking (a software for gps users) needs the 'unbuffer' binary, provided
 by the 'expect' package. unfortunately this dependency is not in the port.
 easy fix.

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Ticket URL: <https://trac.macports.org/ticket/34312>
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