Fixes that "My Page" personalization was not storing reordered blocks (#2971).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2634 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/controllers/my_controller.rb

@@ -139,8 +139,8 @@ class MyController < ApplicationController
   # params[:list-(top|left|right)] : array of block ids of the group
   def order_blocks
     group = params[:group]
-    if group.is_a?(Array)
-      group_items = params["list-#{group}"].collect(&:underscore)
+    if group.is_a?(String)
+      group_items = (params["list-#{group}"] || []).collect(&:underscore)
       if group_items and group_items.is_a? Array
         # remove group blocks if they are presents in other groups
         %w(top left right).each {|f|