[MacPorts] #38753: metapixel 1.0.2_3 does not build with libpng 1.5

[MacPorts]

#38753: metapixel 1.0.2_3 does not build with libpng 1.5
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  Reporter:  eekim@…    |      Owner:  fclaire@…
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.1.3
Resolution:             |   Keywords:
      Port:  metapixel  |
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Comment (by chrstphrchvz):

 I have opened a pull request to apply this patch:
 https://github.com/macports/macports-ports/pull/4024

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Ticket URL: <https://trac.macports.org/ticket/38753#comment:2>
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