Rails3: model: Member: add virtual attribute to prevent error

On Rails 3.0, test fails with following error.

<pre>
Error:
test_validate(MemberTest):
NoMethodError: undefined method `role' for #<Member:0x7f73caf8cd08>
    app/models/member.rb:87:in `validate_role'
    test/unit/member_test.rb:76:in `test_validate'
</pre>

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@8127 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/member.rb

@@ -29,6 +29,12 @@ class Member < ActiveRecord::Base
   before_destroy :set_issue_category_nil
   after_destroy :unwatch_from_permission_change
 
+  def role
+  end
+
+  def role=
+  end
+
   def name
     self.user.name
   end