[MacPorts] #62847: opencv4: fix build failures for MacOS 10.7 and 10.8

[MacPorts]

#62847: opencv4: fix build failures for MacOS 10.7 and 10.8
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  Reporter:  mascguy  |      Owner:  mascguy
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  opencv4  |
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Comment (by kencu):

 there is a workaround here for a similar issue:

 https://xrefs.me/WebCore/webcore/Source/WebCore/platform/audio/Biquad.cpp.html

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Ticket URL: <https://trac.macports.org/ticket/62847#comment:7>
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