ensure rails 3.1

Author: rweng

lib/jquery/datatables/rails/engine.rb

@@ -1,8 +1,10 @@
 # Configure for Rails 3.1
 module Jquery
 	module Datatables
-		module Rails
-			class Engine < ::Rails::Engine
+		if defined?(::Rails) and Rails.version >= "3.1"
+			module ::Rails
+				class Engine < ::Rails::Engine
+				end
 			end
 		end
   end