Fixes Issue sorting in a project, broken by #2317

Issues were sorting but the project id wasn't being added so the
IssuesController would return all issues (cross-project).


git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2324 e93f8b46-1217-0410-a6f0-8f06a7374b81