In `Walker_Category::start_el()`, `$title` might not be set when `$args` are passed multiple levels into `walk_category_tree()`.

See #22400.


Built from https://develop.svn.wordpress.org/trunk@28438


git-svn-id: http://core.svn.wordpress.org/trunk@28265 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Eliminate use of `extract()` in `WP_Widget_RSS::widget()`. 

See #22400.

Built from https://develop.svn.wordpress.org/trunk@28439


git-svn-id: http://core.svn.wordpress.org/trunk@28266 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Eliminate use of `extract()` in `wp_widget_rss_output()`. 

Add `'items' => 0` to `$default_args`. When `0`, the value is set to `10` (the fallback). 
Every other default arg has a default value of `0`.

`items` is expected to always be passed to this function.

See #22400.

Built from https://develop.svn.wordpress.org/trunk@28440


git-svn-id: http://core.svn.wordpress.org/trunk@28267 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Eliminate use of `extract()` in `wp_get_object_terms()`. 

There are 3 properties, just set them to variables. They are used too often to warrant a refactor.

See #22400.

Built from https://develop.svn.wordpress.org/trunk@28441


git-svn-id: http://core.svn.wordpress.org/trunk@28268 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Don't include caption tags in gallery template when there is no caption.

props avryl.
fixes #28089.
Built from https://develop.svn.wordpress.org/trunk@28442


git-svn-id: http://core.svn.wordpress.org/trunk@28269 1a063a9b-81f0-0310-95a4-ce76da25c4cd