In `WP_Meta_Query->get_sql_for_clause()`, the empty initialization of `$where` is dead code and can be removed.

See #30224.

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In `customize.php`, check that `$autofocus` is an `array` after running `wp_unslash()` instead of before. This is admittedly to skip a traversable hint in Scrutinizer.

See #30224.

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Make the docs type for `return` in `wpmu_create_user()` more specific.

See #30224.

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In `get_the_pagination()`, don't pass `$links` to `_navigation_markup()` if it is not a string - `paginate_links()` can return an `array`.

See #30224.

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In `wp_ajax_ajax_tag_search()`, bail immediately if `$_GET['tax']` isn't set so that all of the variable setting can happen in the same nest scope as the rest of the function - `wp_die()` confuses Scrutinizer.

See #30224.

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git-svn-id: http://core.svn.wordpress.org/trunk@30167 1a063a9b-81f0-0310-95a4-ce76da25c4cd
In `wp_ajax_get_tagcloud()`, bail immediately if `$_POST['tax']` isn't set so that all of the variable setting can happen in the same nest scope as the rest of the function - `wp_die()` confuses Scrutinizer.

See #30224.

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Fix the return value doc for `WP_List_Table->get_pagination_arg()`.

See #30224.

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