[MacPorts] #72379: whisper requires C11

[MacPorts]

#72379: whisper requires C11
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  Reporter:  barracuda156  |      Owner:  exprez135
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.10.5
Resolution:                |   Keywords:
      Port:  whisper       |
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Comment (by exprez135):

 I've just attached a patch to the whisper Portfile. It's also on a branch
 on GitHub: https://github.com/exprez135/macports-ports/tree/fix-whisper.
 Are you able to test this to ensure that the build succeeds or is
 prevented gracefully?

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Ticket URL: <https://trac.macports.org/ticket/72379#comment:4>
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