[MacPorts] #27997: netpbm 10.26.64_1 FTB - incompatible png.h version

[MacPorts]

#27997: netpbm 10.26.64_1 FTB - incompatible png.h version
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 Reporter:  gale@…          |       Owner:  mas@…           
     Type:  defect          |      Status:  new             
 Priority:  Normal          |   Milestone:                  
Component:  ports           |     Version:  1.9.2           
 Keywords:  png             |        Port:  netpbm          
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Comment(by ryandesign@…):

 Use WikiFormatting, please.

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Ticket URL: <https://trac.macports.org/ticket/27997#comment:14>
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