[MacPorts] #50659: OpenSceneGraph upgrade to 3.4.0 fails

[MacPorts]

#50659: OpenSceneGraph upgrade to 3.4.0 fails
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  Reporter:  dersh@…         |      Owner:  macports-tickets@…
      Type:  defect          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.3.4
Resolution:                  |   Keywords:
      Port:  OpenSceneGraph  |
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Comment (by dersh@…):

 I am on El Capitan.  So, the port now fails, and should be rolled back
 until it can be fixed.

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Ticket URL: <https://trac.macports.org/ticket/50659#comment:4>
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