[MacPorts] #56247: jack @1.9.12: fatal error: 'MacTypes.h' file not found

[MacPorts]

#56247: jack @1.9.12: fatal error: 'MacTypes.h' file not found
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  Reporter:  iEFdev  |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.4.2
Resolution:          |   Keywords:  lion
      Port:  jack    |
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Comment (by neverpanic):

 OK, so now I'd only need to know when MacTypes.h started appearing on
 newer systems. If you can figure this out for me, I'll commit the patch.

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Ticket URL: <https://trac.macports.org/ticket/56247#comment:8>
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