[MacPorts] #36742: exact-image: error: invalid use of incomplete type 'struct png_info_def'

[MacPorts]

#36742: exact-image: error: invalid use of incomplete type 'struct png_info_def'
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  Reporter:  paoloyx@…    |      Owner:  macports-tickets@…
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.1.2
Resolution:               |   Keywords:
      Port:  exact-image  |
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Comment (by ryandesign@…):

 The latest version still has the libpng 1.5 incompatibility so we'll have
 to locate a patch or write one ourselves.

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Ticket URL: <https://trac.macports.org/ticket/36742#comment:2>
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