Preserve field values on bulk edit failure (#13943).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11787 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/helpers/projects_helper.rb

@@ -69,10 +69,11 @@ module ProjectsHelper
       grouped[version.project.name] << [version.name, version.id]
     end
 
+    selected = selected.is_a?(Version) ? selected.id : selected
     if grouped.keys.size > 1
-      grouped_options_for_select(grouped, selected && selected.id)
+      grouped_options_for_select(grouped, selected)
     else
-      options_for_select((grouped.values.first || []), selected && selected.id)
+      options_for_select((grouped.values.first || []), selected)
     end
   end