[FIX] product_catalog_tree: fix in product catalog fields

closes #816

X-original-commit: b40ee64
Signed-off-by: matiasperalta1 <mnp@adhoc.com.ar>

Author: lav-adhoc

product_catalog_tree/models/product_product.py

@@ -37,6 +37,8 @@ def _compute_catalog_values(self):
         order_id = self.env.context.get("order_id")
 
         if not res_model or not order_id:
+            self.product_catalog_qty = 0
+            self.product_catalog_price = 0
             return
 
         order = self.env[res_model].browse(order_id)