Fixed #17300 -- Prevented createcachetable from crashing when the cache table...

Fixed #17300 -- Prevented createcachetable from crashing when the cache table already exists. Thanks Claude Paroz.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@17363 bcc190cf-cafb-0310-a4f2-bffc1f526a37