ffmpeg - clear pinned revision on HEAD now that we build 0.6 stable

Formula/ffmpeg.rb

@@ -2,10 +2,14 @@ require 'formula'
 
 class Ffmpeg <Formula
   url 'http://ffmpeg.org/releases/ffmpeg-0.6.tar.bz2'
-  sha1 'c130e3bc368251b9130ce6eafb44fe8c3993ff5c'
-  head 'svn://svn.ffmpeg.org/ffmpeg/trunk',
-    :revisions => { :trunk => 22916, 'libswscale' => 31045 }
   homepage 'http://ffmpeg.org/'
+  sha1 'c130e3bc368251b9130ce6eafb44fe8c3993ff5c'
+
+  # Before 0.6, the head version was:
+  # head 'svn://svn.ffmpeg.org/ffmpeg/trunk',
+  #   :revisions => { :trunk => 22916, 'libswscale' => 31045 }
+  # We probably need new revisions specified here:
+  head 'svn://svn.ffmpeg.org/ffmpeg/trunk'
 
   depends_on 'x264' => :optional
   depends_on 'faac' => :optional