Dont load the target before the proxy has had a chance to answer the respond_to? -- this would cause an .empty? query to trigger loading the entire collection if the proxy had already been initialized

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1036 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/lib/active_record/associations/association_proxy.rb

@@ -25,8 +25,7 @@ module ActiveRecord
       end
 
       def respond_to?(symbol, include_priv = false)
-        load_target
-        proxy_respond_to?(symbol, include_priv) || @target.respond_to?(symbol, include_priv)
+        proxy_respond_to?(symbol, include_priv) || (load_target && @target.respond_to?(symbol, include_priv))
       end
 
       def loaded?