Fixed a case where column aliases weren't being quoted properly.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10048 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/models/sql/query.py

@@ -579,7 +579,7 @@ class BaseQuery(object):
                             aliases.add(c_alias)
                             col_aliases.add(c_alias)
                         else:
-                            result.append('%s AS %s' % (r, col[1]))
+                            result.append('%s AS %s' % (r, qn2(col[1])))
                             aliases.add(r)
                             col_aliases.add(col[1])
                     else: