[MacPorts] #32603: Update gimp2-devel @2.7.3 to 2.7.4

[MacPorts]

#32603: Update gimp2-devel @2.7.3 to 2.7.4
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 Reporter:  nicholas.north@…          |       Owner:  macports-tickets@…                   
     Type:  update                    |      Status:  new                                  
 Priority:  Normal                    |   Milestone:                                       
Component:  ports                     |     Version:                                       
 Keywords:                            |        Port:  gimp2-devel                          
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 Gimp 2.7.4 has been released and GTK+ has much better native support for
 Mac OS X.

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Ticket URL: <https://trac.macports.org/ticket/32603>
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