Code cleanup.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@9936 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/changeset.rb

@@ -176,18 +176,12 @@ class Changeset < ActiveRecord::Base
 
   # Returns the previous changeset
   def previous
-    @previous ||= Changeset.find(:first,
-                    :conditions => ['id < ? AND repository_id = ?',
-                                    self.id, self.repository_id],
-                    :order => 'id DESC')
+    @previous ||= Changeset.where(["id < ? AND repository_id = ?", id, repository_id]).order('id DESC').first
   end
 
   # Returns the next changeset
   def next
-    @next ||= Changeset.find(:first,
-                    :conditions => ['id > ? AND repository_id = ?',
-                                    self.id, self.repository_id],
-                    :order => 'id ASC')
+    @next ||= Changeset.where(["id > ? AND repository_id = ?", id, repository_id]).order('id ASC').first
   end
 
   # Creates a new Change from it's common parameters