Retrofit homebrew with an older vips

gistfile1.diff

diff --git a/Library/Formula/vips.rb b/Library/Formula/vips.rb
index e33f734..f9e7369 100644
--- a/Library/Formula/vips.rb
+++ b/Library/Formula/vips.rb
@@ -2,8 +2,8 @@ require 'formula'
 
 class Vips < Formula
   homepage 'http://www.vips.ecs.soton.ac.uk/'
-  url 'http://www.vips.ecs.soton.ac.uk/supported/current/vips-7.30.2.tar.gz'
-  sha1 '5fac9ca28660bb3457290709988911b161239f8c'
+  url 'http://www.vips.ecs.soton.ac.uk/supported/7.26/vips-7.26.8.tar.gz'
+  sha1 'f004194e2859d6020dd2fc5f7b4184601cea07f6'
 
   depends_on 'pkg-config' => :build
   depends_on :libpng