[MacPorts] #48938: ffmpeg build failure on 10.6

[MacPorts]

#48938: ffmpeg build failure on 10.6
--------------------------------+-------------------------
  Reporter:  chilli.namesake@…  |      Owner:  devans@…
      Type:  defect             |     Status:  new
  Priority:  Normal             |  Milestone:
 Component:  ports              |    Version:  2.3.3
Resolution:                     |   Keywords:  snowleopard
      Port:  ffmpeg             |
--------------------------------+-------------------------

Comment (by ionic@…):

 I can confirm that disabling `-Werror=missing-prototypes` fixes the
 compile issues on OS X 10.6. No other changes needed.

 I will upload a patch either late today or during the upcoming days. It
 will only target `ffmpeg`, so you'll probably have to backport it to
 `ffmpeg-devel`, but I don't feel like test-building this port in a slow-
 as-hell VM on an overcommitted-as-is machine...

-- 
Ticket URL: <https://trac.macports.org/ticket/48938#comment:10>
MacPorts <https://www.macports.org/>
Ports system for OS X