Fix crash on group => show

app/views/admin/groups/show.html.haml

@@ -78,6 +78,7 @@
           %td.projects_access
             - u.authorized_projects.in_namespace(@group).each do |project|
               - u_p = u.users_projects.in_project(project).first
+              - next unless u_p
               %span
                 = project.name
                 = link_to "(#{ u_p.project_access_human })", edit_admin_team_member_path(u_p)