[MacPorts] #59737: webkit2-gtk @2.26.2 +quartz build failure on 10.13

[MacPorts]

#59737: webkit2-gtk @2.26.2 +quartz build failure on 10.13
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  Reporter:  maehne       |      Owner:  dbevans
      Type:  defect       |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  webkit2-gtk  |
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Comment (by kencu):

 I have this sorted out, and it builds +quartz on my 10.13 system. Just
 testing to see that my fix didn't break something else. There is a PR up
 in the PR queue for this if you get impatient.

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Ticket URL: <https://trac.macports.org/ticket/59737#comment:2>
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