[MacPorts] #30778: science/xmedcon sysgcc variant breaks portfile

[MacPorts]

#30778: science/xmedcon sysgcc variant breaks portfile
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 Reporter:  rmstonecipher@…             |       Owner:  jameskyle@…           
     Type:  defect                      |      Status:  new                   
 Priority:  Normal                      |   Milestone:                        
Component:  ports                       |     Version:  2.0.1                 
 Keywords:                              |        Port:  xmedcon               
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Comment(by rmstonecipher@…):

 Re-added gtk2 variant as a default variant per community suggestion to
 allow non-GUI installation (-gtk2) if desired.

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Ticket URL: <https://trac.macports.org/ticket/30778#comment:3>
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