Update AMF export code

lib/Slic3r/GUI/Plater.pm

@@ -789,7 +789,6 @@ sub make_model {
         my $model_object = $plater_object->get_model_object;
         
         my $new_model_object = $model->add_object(
-            vertices    => $model_object->vertices,
             input_file  => $plater_object->input_file,
             config      => $plater_object->config,
             layer_height_ranges => $plater_object->layer_height_ranges,
@@ -798,7 +797,7 @@ sub make_model {
         foreach my $volume (@{$model_object->volumes}) {
             $new_model_object->add_volume(
                 material_id => $volume->material_id,
-                facets      => $volume->facets,
+                mesh        => $volume->mesh,
             );
             $model->set_material($volume->material_id || 0, {});
         }