Merged r2119 to r2127 from trunk.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/0.8-stable@2133 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/enumeration.rb

@@ -44,7 +44,9 @@ class Enumeration < ActiveRecord::Base
   end
 
   def before_save
-    Enumeration.update_all("is_default = #{connection.quoted_false}", {:opt => opt}) if is_default?
+    if is_default? && is_default_changed?
+      Enumeration.update_all("is_default = #{connection.quoted_false}", {:opt => opt})
+    end
   end
   
   def objects_count