Don't allow users to double flag stuff

Correct seed fu to match model

db/fixtures/post_action_types.rb

@@ -27,6 +27,13 @@ PostActionType.seed do |s|
   s.position = 4
 end
 
+PostActionType.seed do |s|
+  s.id = PostActionType.Types[:vote]
+  s.name_key = 'vote'
+  s.is_flag = false
+  s.position = 5
+end
+
 PostActionType.seed do |s|
   s.id = PostActionType.Types[:spam]
   s.name_key = 'spam'