Fixed #6420 -- Corrected the handling of the --traceback option in loaddata....

Fixed #6420 -- Corrected the handling of the --traceback option in loaddata. Thanks, Grzegorz Lukasik <hauserx@gmail.com>.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@7199 bcc190cf-cafb-0310-a4f2-bffc1f526a37