Fixes #14873 -- A paginated ListView with a List instead of queryset produces an error.

Additional minor change in functionality: the page is now not considered paginated if the objects do not span multiple pages according to the paginator. This will only affect views with a custom paginator method which uses orphans.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@14864 bcc190cf-cafb-0310-a4f2-bffc1f526a37