Correct expect_payment_forwarded upstream channel checking

`expect_payment_forwarded` takes a bool to indicate that the
inbound channel on which we received a forwarded payment has been
closed, but then ignores it in favor of looking at the fee in the
event. While this is generally correct, in cases where we process
an event after a channel was closed, which was generated before a
channel closed this is incorrect.

Instead, we examine the bool we already passed and use that.

Author: TheBlueMatt

lightning/src/ln/functional_test_utils.rs

@@ -1997,7 +1997,7 @@ macro_rules! expect_payment_forwarded {
 				outbound_amount_forwarded_msat: _
 			} => {
 				assert_eq!(fee_earned_msat, $expected_fee);
-				if fee_earned_msat.is_some() {
+				if !$upstream_force_closed {
 					// Is the event prev_channel_id in one of the channels between the two nodes?
 					assert!($node.node.list_channels().iter().any(|x| x.counterparty.node_id == $prev_node.node.get_our_node_id() && x.channel_id == prev_channel_id.unwrap()));
 				}

lightning/src/ln/functional_tests.rs

@@ -8710,7 +8710,8 @@ fn do_test_onchain_htlc_settlement_after_close(broadcast_alice: bool, go_onchain
 	assert_eq!(carol_updates.update_fulfill_htlcs.len(), 1);
 
 	nodes[1].node.handle_update_fulfill_htlc(&nodes[2].node.get_our_node_id(), &carol_updates.update_fulfill_htlcs[0]);
-	expect_payment_forwarded!(nodes[1], nodes[0], nodes[2], if go_onchain_before_fulfill || force_closing_node == 1 { None } else { Some(1000) }, false, false);
+	let went_onchain = go_onchain_before_fulfill || force_closing_node == 1;
+	expect_payment_forwarded!(nodes[1], nodes[0], nodes[2], if went_onchain { None } else { Some(1000) }, went_onchain, false);
 	// If Alice broadcasted but Bob doesn't know yet, here he prepares to tell her about the preimage.
 	if !go_onchain_before_fulfill && broadcast_alice {
 		let events = nodes[1].node.get_and_clear_pending_msg_events();

lightning/src/ln/payment_tests.rs

@@ -611,7 +611,7 @@ fn do_retry_with_no_persist(confirm_before_reload: bool) {
 	nodes[1].node.handle_update_fulfill_htlc(&nodes[2].node.get_our_node_id(), &htlc_fulfill_updates.update_fulfill_htlcs[0]);
 	check_added_monitors!(nodes[1], 1);
 	commitment_signed_dance!(nodes[1], nodes[2], htlc_fulfill_updates.commitment_signed, false);
-	expect_payment_forwarded!(nodes[1], nodes[0], nodes[2], None, false, false);
+	expect_payment_forwarded!(nodes[1], nodes[0], nodes[2], None, true, false);
 
 	if confirm_before_reload {
 		let best_block = nodes[0].blocks.lock().unwrap().last().unwrap().clone();