[MacPorts] #54183: qt4-mac @4.8.7: build failures with clang-4.0 due to comparison between pointer and zero

[MacPorts]

#54183: qt4-mac @4.8.7: build failures with clang-4.0 due to comparison between
pointer and zero
----------------------+-----------------
  Reporter:  kencu    |      Owner:
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  qt4-mac  |
----------------------+-----------------

Comment (by michaelld):

 It looks like there are just the 2 mentioned comparisons, and I'm happy to
 use the patches provided by FreeBSD. They look good enough to me. Yes, the
 ">=" is a little strange, but I think their fix is the correct way to go.
 I'm testing a patch right now on 10.8 and 10.12.

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Ticket URL: <https://trac.macports.org/ticket/54183#comment:7>
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