[MacPorts] #20575: xfce4-panel: allow cairo-devel to satisfy cairo dependency

[MacPorts]

#20575: xfce4-panel: allow cairo-devel to satisfy cairo dependency
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 Reporter:  ryandesign@…             |       Owner:  afb@…           
     Type:  enhancement              |      Status:  new             
 Priority:  Normal                   |   Milestone:                  
Component:  ports                    |     Version:  1.7.1           
 Keywords:                           |        Port:  xfce4-panel     
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 Could you change the cairo dependency in xfce4-panel so that cairo-devel
 could satisfy it? The attached patch does this.

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Ticket URL: <http://trac.macports.org/ticket/20575>
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