mplayer: apply ustream patch for Lion

This issue was identified by Sharpie on github.  I pulled the fix
  from the svn trunk of mplayer.  It was fixed in revision 32840.

  https://gist.github.com/mxcl/homebrew/issues/6408

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Formula/mplayer.rb

@@ -13,7 +13,12 @@ class Mplayer < Formula
   def patches
     # When building from SVN HEAD, configure prompts the user to pull FFmpeg
     # from git.  Don't do that.
-    DATA if ARGV.build_head?
+    if ARGV.build_head?
+      DATA
+    elsif `uname -r` =~ /^11\./
+      # Lion requires the following diff (which is already fixed in svn trunk)
+      "https://raw.github.com/gist/1105164/704c64c97ab7ffcc3e5f69b1c5d4fb0850f572c1/vd_mpng.c.diff"
+    end
   end
 
   def install