fixup! ln: persist failure_reason with HTLCFailureReason

Author: carlaKC

lightning/src/ln/onion_utils.rs

@@ -1855,10 +1855,10 @@ impl_writeable_tlv_based_enum!(HTLCFailReasonRepr,
 				HTLCFailReasonRepr::LightningError{ .. } => None,
 				HTLCFailReasonRepr::Reason{ failure_reason, .. } => Some(failure_reason.failure_code())
 			})),
-		(2, data, required_vec),
 		// failure_code was required, and is replaced by reason in 0.2 so any time we do not have a
 		// reason available failure_code will be Some and can be expressed as a reason.
-		(4, failure_reason, (default_value, LocalHTLCFailureReason::from(_failure_code.ok_or(DecodeError::InvalidValue)?))),
+		(1, failure_reason, (default_value, LocalHTLCFailureReason::from(_failure_code.ok_or(DecodeError::InvalidValue)?))),
+		(2, data, required_vec),
 	},
 );