title: Zero refund check for FungibleAdapter
doc:
- audience: Runtime User
  description: |-
    `FungibleAdapter` will now check if the _refund amount_ is zero before calling deposit & emitting an event.

    Fixes https://github.com/paritytech/polkadot-sdk/issues/6469.
crates:
- name: pallet-transaction-payment
  bump: patch