Merged r4086 from trunk.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/1.0-stable@4145 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/time_entry.rb

@@ -81,4 +81,12 @@ class TimeEntry < ActiveRecord::Base
       yield
     end
   end
+
+  def self.earilest_date_for_project
+    TimeEntry.minimum(:spent_on, :include => :project, :conditions => Project.allowed_to_condition(User.current, :view_time_entries))
+  end
+
+  def self.latest_date_for_project
+    TimeEntry.maximum(:spent_on, :include => :project, :conditions => Project.allowed_to_condition(User.current, :view_time_entries))
+  end
 end