Posts with same title cannot be imported into different post types

[misternifty]

1. Import a post using a standard WXR
2. Edit the WXR and change the post type (to a registered post type) of a previously imported item
3. Importer will say the post already exists

A post can exist with the same title in two different post types. The importer should reflect this as well.

[duck_]

Could do either of

• Update post_exists() to accept a $post_type parameter
• Retrieve the result of post_exists() in the importer and check the post type

The second can be done quickest as the first isn't going to happen for 3.3.

[duck_]

19218.diff​ for option two described above.

[duck_]

​http://plugins.trac.wordpress.org/changeset/485059