Terms are uselessly counted when saving a post

[Chouby]

This occurs even when terms have not been modified and when the post status has not changed. This is due to _update_term_count_on_transition_post_status not checking if the post status has been modified.

[johnbillion]

What about the situation where a published post gets its terms changed but the status doesn't change? It looks like this change would cause the term count for newly added terms to get out of sync.

[Chouby]

In that case, wp_set_object_terms calls wp_update_term_count, so the term count should be correctly udpated.