[1.0.X] Fixed #9479 -- Corrected an edge case in bulk queryset deletion that...

[1.0.X] Fixed #9479 -- Corrected an edge case in bulk queryset deletion that could cause an infinite loop when using MySQL InnoDB.

Merge of 10913-10914 from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@10915 bcc190cf-cafb-0310-a4f2-bffc1f526a37