[MacPorts] #59196: popper fails to compile with XCode 11 on MacOS 10.14

[MacPorts]

#59196: popper fails to compile with XCode 11 on MacOS 10.14
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  Reporter:  tk7r     |      Owner:  (none)
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.6.1
Resolution:           |   Keywords:
      Port:  poppler  |
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Comment (by mf2k):

 Please do not Cc openmaintainer because it is
 [wiki:MacPortsDevelopers#special not a valid email address].

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Ticket URL: <https://trac.macports.org/ticket/59196#comment:1>
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