Update Shopify payment even if the captured amount is zero

Closes #14181

modules/web_shop_shopify/account.py

@@ -96,7 +96,7 @@ class Payment(IdentifierMixin, metaclass=PoolMeta):
 
         to_save = []
         for payment in id2payments.values():
-            if captured[payment] and payment.amount != captured[payment]:
+            if payment.amount != captured[payment]:
                 payment.amount = captured[payment]
                 to_save.append(payment)
         cls.proceed(to_save)

modules/web_shop_shopify/tests/scenario_web_shop_shopify.rst

@@ -503,7 +503,7 @@ Run fetch order::
     >>> payment.state
     'processing'
     >>> payment.amount
-    Decimal('258.98')
+    Decimal('0')
     >>> assertEqual(sale.carrier, carrier)
     >>> sale.state
     'quotation'