[MacPorts] #56414: mlt: upgrade to v6.6.0

[MacPorts]

#56414: mlt: upgrade to v6.6.0
-----------------------+---------------------------------
  Reporter:  ddennedy  |      Owner:  (none)
      Type:  update    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:  maintainer haspatch
      Port:  mlt       |
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Comment (by ddennedy):

 In [changeset:"745ebf602ab8d2b02ccb4eb5fef8b5580f62dca9/macports-ports"
 745ebf602ab8d2b02ccb4eb5fef8b5580f62dca9/macports-ports] (master):
 {{{
 #!ConfigurableCommitTicketReference repository="macports-ports"
 revision="745ebf602ab8d2b02ccb4eb5fef8b5580f62dca9"
 mlt: update to 6.8.0

 * convert to github PortGroup
 * add my github handle
 * build only against sdl2 (not 1.2) if not disable_sdl variant
 * add dependencies on fftw-3 and libebur120 for new filters
 * supersedes patch in https://trac.macports.org/ticket/56414
 * resolves ffmpeg compile error reported in
 https://trac.macports.org/ticket/56412
 }}}

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Ticket URL: <https://trac.macports.org/ticket/56414#comment:7>
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