Fixes project members copy with multiple roles.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2728 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/project.rb

@@ -340,6 +340,7 @@ class Project < ActiveRecord::Base
       project.members.each do |member|
         new_member = Member.new
         new_member.attributes = member.attributes.dup.except("project_id")
+        new_member.role_ids = member.role_ids.dup
         new_member.project = self
         self.members << new_member
       end