[MacPorts] #70367: dia fails to link: Undefined symbols: "_png_get_header_ver"

[MacPorts]

#70367: dia fails to link: Undefined symbols: "_png_get_header_ver"
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  Reporter:  barracuda156  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.9.3
Resolution:                |   Keywords:
      Port:  dia           |
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Comment (by ryandesign):

 We'll need to see the main.log and config.log to help diagnose it.

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Ticket URL: <https://trac.macports.org/ticket/70367#comment:4>
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