fix bitpref references

app/controllers/dmails_controller.rb

@@ -53,7 +53,8 @@ class DmailsController < ApplicationController
     Dmail.visible.unread.each do |x|
       x.update_column(:is_read, true)
     end
-    CurrentUser.user.update_column(:has_mail, false)
+    CurrentUser.user.has_mail = false
+    CurrentUser.user.save
   end
 
 private

app/models/user.rb

@@ -75,7 +75,8 @@ class User < ActiveRecord::Base
     end
 
     def unban!
-      update_column(:is_banned, false)
+      self.is_banned = false
+      save
       ban.destroy
     end
   end