If post type "post" not exist

[djudorange]

If the post type "post" is unregister, in users list page (in admin) ,
you have an error Mysql.

At line 4156 in wp-includes/post.php, the get_post_type_object() returns false (because the post type don't exist), the next "if" returns '1 = 0'.

But it missing the 'WHERE' before '1 = 0'.

It is possible to fix it by replacing the '1 = 0' to 'WHERE 1 = 0'

Adds "WHERE" if $full is true.

Looks good.

In [19117]:

Return full WHERE clause from get_posts_by_author_sql() if the post type isn't registerd. Fixes SQL sytax on users list when 'post' is unregistered. Fixes #19116.