Fixed #7886 -- Reordered some code in Query.results_iter() to ensure that all

the prequisites are correctly initialised prior to using them. Only affects
Oracle and other db backends requiring resolve_columns() (e.g. MS SQL?)


git-svn-id: http://code.djangoproject.com/svn/django/trunk@8112 bcc190cf-cafb-0310-a4f2-bffc1f526a37