[MacPorts] #73949: libwmf 0.2.15: build fails when an older libwmf is already installed (incomplete fix in f79f336322e)

[MacPorts]

#73949: libwmf 0.2.15: build fails when an older libwmf is already installed
(incomplete fix in f79f336322e)
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  Reporter:  lukaso  |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  libwmf  |
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Comment (by lukaso):

 I'm unfortunately not able to test after this change as I no longer have
 the old libwmf installed (I used the workaround).

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Ticket URL: <https://trac.macports.org/ticket/73949#comment:3>
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