Fixed #15283 -- Made a minor performance tweak to __iter__. Thanks to lanyjie for the report.
Fixed #15283 -- Made a minor performance tweak to __iter__. Thanks to lanyjie for the report.

git-svn-id: 554f83ef17aa7291f84efa897c1acfc5d0035373@15491 bcc190cf-cafb-0310-a4f2-bffc1f526a37

svn2github/django,svn2github/django,svn2github/django