Bug within get_the_rpr_recipe_schema (non-numeric values)

Hi

Due to empty values, I’m getting the following error:
<b>Warning</b>: A non-numeric value encountered in <b>wp-content/plugins/recipepress-reloaded/inc/frontend/class-template.php</b> on line <b>1612</b><br />

In order to fix this, my suggestion would be to change all lines (where numeric values are expected) within the method get_the_rpr_recipe_schema()

in File (Starting on line 1557):
wp-content/plugins/recipepress-reloaded/inc/frontend/class-template.php

from:

                $prep_time     = isset( $metadata['rpr_recipe_prep_time'] ) ? $metadata['rpr_recipe_prep_time'] : 0;
                $cook_time     = isset( $metadata['rpr_recipe_cook_time'] ) ? $metadata['rpr_recipe_cook_time'] : 0;
                $passive_time  = isset( $metadata['rpr_recipe_passive_time'] ) ? $metadata['rpr_recipe_passive_time'] : 0;
[...]

to

                $prep_time     = !empty( $metadata['rpr_recipe_prep_time'] ) ? (int)$metadata['rpr_recipe_prep_time'] : 0;
                $cook_time     = !empty( $metadata['rpr_recipe_cook_time'] ) ? (int)$metadata['rpr_recipe_cook_time'] : 0;
                $passive_time  = !empty( $metadata['rpr_recipe_passive_time'] ) ? (int)$metadata['rpr_recipe_passive_time'] : 0;
[...]

Would you agree?
Thanks for looking into this ??