Fixed #1454 -- Improved DB API quote_only_if_word() so that it doesn't quote...

Fixed #1454 -- Improved DB API quote_only_if_word() so that it doesn't quote 'select' parameters that are not all word characters. Thanks, dja@cdc.msbx.net

git-svn-id: http://code.djangoproject.com/svn/django/trunk@3044 bcc190cf-cafb-0310-a4f2-bffc1f526a37