Eliminate use of `extract()` in `WP_Ajax_Response::add()`. Just set most of the properties to variables to avoid interpolation churn.

See #22400.

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git-svn-id: http://core.svn.wordpress.org/trunk@28257 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Eliminate use of `extract()` in `get_comment_reply_link()`. 

See #22400.

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git-svn-id: http://core.svn.wordpress.org/trunk@28258 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Eliminate use of `extract()` in `wp_dropdown_categories()`. 

See #22400.

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git-svn-id: http://core.svn.wordpress.org/trunk@28259 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Eliminate use of `extract()` in `default-widgets.php`. 

Props rzen, wonderboymusic.

See #22400.

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git-svn-id: http://core.svn.wordpress.org/trunk@28260 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Eliminate use of `extract()` in `wp_list_categories()`. 

See #22400.

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git-svn-id: http://core.svn.wordpress.org/trunk@28261 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Eliminate use of `extract()` in `wp_generate_tag_cloud()`. 

See #22400.

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git-svn-id: http://core.svn.wordpress.org/trunk@28262 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Eliminate use of `extract()` in `Walker_Category::start_el()`. 

See #22400.

Built from https://develop.svn.wordpress.org/trunk@28436


git-svn-id: http://core.svn.wordpress.org/trunk@28263 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Eliminate use of `extract()` in `wp_allow_comment()`. 

See #22400.

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git-svn-id: http://core.svn.wordpress.org/trunk@28264 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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.

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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.

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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.

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