From ace0450774daa258936efcaa6f0b18ba02a4a439 Mon Sep 17 00:00:00 2001
From: Chris Eppstein <chris@eppsteins.net>
Date: Sat, 6 Mar 2010 16:27:12 -0800
Subject: [PATCH] Fix a bug in 1.8.6 where readbyte is not defined.

---
 lib/compass/sass_extensions/functions/image_size.rb | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/compass/sass_extensions/functions/image_size.rb b/lib/compass/sass_extensions/functions/image_size.rb
index 02a07539..c143faa8 100644
--- a/lib/compass/sass_extensions/functions/image_size.rb
+++ b/lib/compass/sass_extensions/functions/image_size.rb
@@ -69,6 +69,11 @@ private
   private
     def examine(io)
       class << io
+        unless method_defined?(:readbyte)
+          def readbyte
+            getc
+          end
+        end
         def readint; (readbyte << 8) + readbyte; end
         def readframe; read(readint - 2); end
         def readsof; [readint, readbyte, readint, readint, readbyte]; end