Fixed Oracle backend test case failure in modeltests\lookup.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8355 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/models/query.py

@@ -689,7 +689,7 @@ class ValuesListQuerySet(ValuesQuerySet):
                 yield row[0]
         elif not self.query.extra_select:
             for row in self.query.results_iter():
-                yield row
+                yield tuple(row)
         else:
             # When extra(select=...) is involved, the extra cols come are
             # always at the start of the row, so we need to reorder the fields