Update SDL_mixer for 10.6.

Updated configure args and a patch for SDL_mixer to allow it to compile
under Snow Leopard.

Formula/sdl_mixer.rb

@@ -7,19 +7,45 @@ class SdlMixer <Formula
 
   depends_on 'sdl'
   
+  def patches
+    # http://www.libsdl.org/cgi/viewvc.cgi/trunk/SDL_mixer/configure.in?r1=4868&r2=4867&pathrev=4868
+    DATA
+  end
+
   def install
+    ENV.gcc_4_2
     # We use a private include folder, and then
     # symlink the header file ourselves.
     # See: http://github.com/mxcl/homebrew/issues#issue/62
     system "./configure", "--prefix=#{prefix}",
                           "--includedir=#{prefix}/priv_include",
                           "--disable-debug",
-                          "--disable-dependency-tracking"
+                          "--disable-dependency-tracking",
+                          # http://trac.macports.org/changeset/58317
+                          "--disable-music-native-midi"
     system "make install"
 
     # Hack alert:
-    # Since SDL is installed as a depency, we know it exists, so we
+    # Since SDL is installed as a dependency, we know it exists, so we
     # symlink our new header file into its brewed location.
-    system "ln", "-s", "#{prefix}/priv_include/SDL/SDL_mixer.h", "#{HOMEBREW_PREFIX}/include/SDL"
+    FileUtils.ln_s "#{prefix}/priv_include/SDL/SDL_mixer.h", "#{HOMEBREW_PREFIX}/include/SDL"
   end
 end
+
+
+__END__
+--- a/configure.in	2009/09/27 19:23:04	4867
++++ b/configure.in	2009/09/27 19:34:09	4868
+@@ -221,8 +221,10 @@
+                 EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lwinmm"
+                 ;;
+             *-*-darwin*)
+-                use_music_native_midi=yes
+-                EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,-framework,QuickTime -Wl,-framework,CoreServices"
++                # This doesn't work on Mac OS X 10.5+
++                # Max Horn (the original author) recommends disabling it for now.
++                #use_music_native_midi=yes
++                #EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,-framework,QuickTime -Wl,-framework,CoreServices"
+                 ;;
+         esac
+         if test x$use_music_native_midi = xyes; then