doh typo in commit from the hip

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@5806 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activeresource/lib/active_resource/base.rb

@@ -101,7 +101,7 @@ def create_site_uri_from(site)
 
         def query_string(options)
           # Omit parameters which appear in the URI path.
-          path unless defined?(@prefix_parameters)
+          prefix unless defined?(@prefix_parameters)
           query_params = options.reject { |key, value| @prefix_parameters.include?(key) }
 
           # Accumulate a list of escaped key=value pairs for the given parameters.