[Closed] Database error when upgrading WCML

WCML
woocommerce-multilingual/inc/class-wcml-upgrade.php line 726

```
$wpdb->query( "DELETE FROM {$wpdb->prefix}woocommerce_bundled_itemmeta WHERE `meta_id` IN (" . DB::prepareIn( $not_existing_items ) . ')' );
```

We get a notice from this when the IN statement is empty:
>WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1 for query DELETE FROM foowoocommerce_bundled_itemmeta WHERE `meta_id` IN ()

This is a bug in WCML.
The fix is to not run this query if `$not_existing_items` is empty

This is a simple fix that should get shipped with the next release please