Don't re-define local methods

lib/draper/base.rb

@@ -49,9 +49,11 @@ module Draper
 
     def build_methods
       select_methods.each do |method|
-        (class << self; self; end).class_eval do
-          define_method method do |*args, &block|
-            source.send method, *args, &block
+        unless self.respond_to(method)
+          (class << self; self; end).class_eval do
+            define_method method do |*args, &block|
+              source.send method, *args, &block
+            end
           end
         end
       end  

lib/draper/version.rb

@@ -1,3 +1,3 @@
 module Draper
-  VERSION = "0.4.0"
+  VERSION = "0.4.1"
 end