[MacPorts] #38018: Doxygen: Prevent clang memory leak by adding back the flag reinplaced away by r101062

[MacPorts]

#38018: Doxygen: Prevent clang memory leak by adding back the flag reinplaced away
by r101062
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  Reporter:  egall@…  |      Owner:  css@…
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.1.3
Resolution:           |   Keywords:
      Port:  doxygen  |
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Comment (by egall@…):

 Thanks! (This can be closed as "fixed" now btw)

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Ticket URL: <https://trac.macports.org/ticket/38018#comment:6>
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