Force utf-8 encoding for ldap omniauth_info.name

app/models/user.rb

@@ -98,7 +98,7 @@ class User < ActiveRecord::Base
   end
 
   def self.find_for_ldap_auth(omniauth_info)
-    name = omniauth_info.name
+    name = omniauth_info.name.force_encoding("utf-8")
     email = omniauth_info.email.downcase
 
     if @user = User.find_by_email(email)