[MacPorts] #38246: problem with libpng while installing matplotlib on mountain lion

[MacPorts]

#38246: problem with libpng while installing matplotlib on mountain lion
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  Reporter:  ashkan.ekhtiari@…  |      Owner:  ryandesign@…
      Type:  defect             |     Status:  new
  Priority:  Normal             |  Milestone:
 Component:  ports              |    Version:  2.1.3
Resolution:                     |   Keywords:
      Port:  libpng             |
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Comment (by ryandesign@…):

 This looks like #29223 which was fixed in MacPorts 2.1.3. What version do
 you have? Run "port version" to find out. Then run "sudo port selfupdate"
 to update to MacPorts 2.1.3, then "sudo port clean libpng" and try again.

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Ticket URL: <https://trac.macports.org/ticket/38246#comment:2>
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