Updates the form state's comment entity by processing this submission's values.
This is the default builder function for the comment form. It is called during the "Save" and "Preview" submit handlers to retrieve the entity to save or preview. This function can also be called by a "Next" button of a wizard to update the form state's entity with the current step's values before proceeding to the next step.
function comment_form_submit_build_comment($form, &$form_state) {
$comment = $form_state['comment'];
entity_form_submit_build_entity('comment', $comment, $form, $form_state);
comment_submit($comment);
return $comment;
}