PHP Warning: non-numeric value

This has been an issue for multiple versions.

Example error location:

PHP Warning: A non-numeric value encountered in /public_html/wp-content/plugins/woo-shipping-dpd-baltic/admin/class-dpd-parcels.php on line 325

And that line would refer to:

$temp_weight = $cart_item['data']->get_weight() * $cart_item['quantity'];

Some (if not most) shops do not provide weight values for products thus it would be logical to convert retrieved weight values to numeric value (weight can also be a float/double so probably it’s best to check if value is returned, and if not, assign a 0).

There are multiple locations where this is happening, ie same file on line 338:

$total_weight_of_cart[] = $cart_item['data']->get_weight();