libgdiplus 2.10

Also adds a patch from NetBSD to correct compilation against libpng 1.5.
See: https://bugs.gentoo.org/355113

Fixes Homebrew#9253.

Library/Formula/libgdiplus.rb

@@ -1,16 +1,25 @@
 require 'formula'
 
 class Libgdiplus < Formula
-  url 'http://ftp.novell.com/pub/mono/sources/libgdiplus/libgdiplus-2.6.tar.bz2'
+  url 'http://ftp.novell.com/pub/mono/sources/libgdiplus/libgdiplus-2.10.tar.bz2'
   homepage 'http://www.mono-project.com/Libgdiplus'
-  md5 '9107b4429fdafde914bd23405544c58d'
+  md5 '451966e8f637e3a1f02d1d30f900255d'
 
   depends_on 'gettext'
   depends_on 'libtiff'
   depends_on 'libexif'
   depends_on 'glib'
 
+  def patches
+    # fixes compilation against libpng1.5
+    # see https://bugs.gentoo.org/355113
+    # and https://bugzilla.novell.com/show_bug.cgi?id=666583
+    { :p0 => 'http://cvsweb.se.netbsd.org/cgi-bin/bsdweb.cgi/~checkout~/pkgsrc/graphics/libgdiplus/patches/patch-aa?rev=1.9;content-type=text%2Fplain' }
+  end if MacOS.lion?
+
   def install
+    ENV.x11
+
     system "./configure", "--prefix=#{prefix}", "--disable-debug", "--disable-dependency-tracking"
     system "make install"
   end