[MacPorts] #28047: libglade2 expects libpng12

[MacPorts]

#28047: libglade2 expects libpng12
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 Reporter:  snc@…             |       Owner:  macports-tickets@…                   
     Type:  defect            |      Status:  new                                  
 Priority:  Normal            |   Milestone:                                       
Component:  ports             |     Version:  1.9.2                                
 Keywords:                    |        Port:  libglade2 libpng                     
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Comment(by snc@…):

 I am seeing `-I/opt/local/include/libpng14` and `-lpng14` in the build
 commands.

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Ticket URL: <https://trac.macports.org/ticket/28047#comment:1>
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