[MacPorts] #43329: qt4-mac fails to build when using macosx_deployment_target on 10.9

[MacPorts]

#43329: qt4-mac fails to build when using macosx_deployment_target on 10.9
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  Reporter:  springermac@…  |      Owner:  michaelld@…
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.2.1
Resolution:                 |   Keywords:  haspatch
      Port:  qt4-mac        |
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Comment (by michaelld@…):

 Good catch. Your patch wasn't entirely correct, but I understand the
 intent now after reviewing it a few times. I'll push a fix shortly.

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Ticket URL: <https://trac.macports.org/ticket/43329#comment:2>
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