[MacPorts] #64203: po4a: build failure on macOS 12

[MacPorts]

#64203: po4a: build failure on macOS 12
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  Reporter:  i0ntempest  |      Owner:  mascguy
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.7.1
Resolution:              |   Keywords:
      Port:  po4a        |
-------------------------+----------------------
Changes (by mascguy):

 * status:  reopened => assigned
 * owner:  (none) => mascguy


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Ticket URL: <https://trac.macports.org/ticket/64203#comment:7>
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