Fixed: editing a message may cause sticky attribute to be NULL (#3356).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2787 e93f8b46-1217-0410-a6f0-8f06a7374b81

db/migrate/20090614091200_fix_messages_sticky_null.rb

@@ -0,0 +1,9 @@
+class FixMessagesStickyNull < ActiveRecord::Migration
+  def self.up
+    Message.update_all('sticky = 0', 'sticky IS NULL')
+  end
+
+  def self.down
+    # nothing to do
+  end
+end