[MacPorts] #24948: gtk2 2.20.1: add patch from upstream GTK+ bug 616851

[MacPorts]

#24948: gtk2 2.20.1: add patch from upstream GTK+ bug 616851
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 Reporter:  suv-sf@…                      |       Owner:  nox@…           
     Type:  defect                        |      Status:  new             
 Priority:  Normal                        |   Milestone:                  
Component:  ports                         |     Version:  1.8.2           
 Keywords:                                |        Port:  gtk2            
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Comment(by gellule.xg@…):

 Just a comment to confirm that the attached patch fixed the inkscape
 (+no_x11 +quartz) crash referenced in the ticket description.

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Ticket URL: <http://trac.macports.org/ticket/24948#comment:2>
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