[MacPorts] #54009: libsndfile @1.0.27: update to 1.0.28

[MacPorts]

#54009: libsndfile @1.0.27: update to 1.0.28
-------------------------+----------------------
  Reporter:  l2dy        |      Owner:  janstary
      Type:  update      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:  security
      Port:  libsndfile  |
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Comment (by janstary):

 Attached find a diff to the Portfile which upgrades libsndfile to 1.0.28
 and a patchfile that removes the newly introduced -Wvla option which
 breaks build on MacOS 10.6.8 whose gcc 4.2.1 does not recognize this
 option.

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Ticket URL: <https://trac.macports.org/ticket/54009#comment:1>
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