Required field with optional URL and title fails validation on settings form

The 5 year old patch to link.module does not apply to the latest link 7.x-1.x-dev and if still applicable needs a reroll.

Checking patch link.module...
error: while searching for:
  if ($type == FALSE && $instance['settings']['validate_url'] === 0) {
    $type = LINK_EXTERNAL;
  }
  $url = link_cleanup_url($item['url']);
  $url_parts = _link_parse_url($url);

  // We can't check_plain('<front>') because it'll break.

error: patch failed: link.module:430
error: link.module: patch does not apply

Think I just ran into this...

I need to remove empty fields, but since the title is required, there is no way to remove them. (Thanks to Drupal not having a remove button for fields...)

The logic is wonky in that a required form within the field, despite all being blank, results in the page not saving to remove the empty fields.

Update: The field was not required, however Title was.

I believe there needs to be logic that "if all forms within link field are blank, ignore requirements and purge field".

Thank you, that condenses it down to the bare fix and applies correctly.

Let's add some test coverage to this too.