make posts have empty photos so reshared stop messing up

app/models/post.rb

@@ -72,6 +72,7 @@ class Post < ActiveRecord::Base
 
   def raw_message; ""; end
   def mentioned_people; []; end
+  def photos; []; end
 
   def self.excluding_blocks(user)
     people = user.blocks.map{|b| b.person_id}