Fixed #3929 -- Newforms Textarea widget now always includes 'rows' and 'cols' attributes, even if you don't pass them in, for HTML correctness. Thanks, and welcome back, Luke Plant

git-svn-id: http://code.djangoproject.com/svn/django/trunk@4961 bcc190cf-cafb-0310-a4f2-bffc1f526a37