[MacPorts] #62048: portmidi: update to r234

[MacPorts]

#62048: portmidi: update to r234
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  Reporter:  mascguy   |      Owner:  mascguy
      Type:  update    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  portmidi  |
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Comment (by jmroot):

 Note that r234 is an svn snapshot, not at actual release. An actual
 release is hoped for "before the end of the year" (written in 2020, so
 presumably the timeframe slipped a bit).

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Ticket URL: <https://trac.macports.org/ticket/62048#comment:3>
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