fix Don’t carry the tx after input received

Author: optout21

lightning/src/ln/interactivetxs.rs

@@ -880,8 +880,7 @@ impl NegotiationContext {
 					sequence: Sequence(msg.sequence),
 					..Default::default()
 				};
-				let single_input =
-					SingleOwnedInput { input: txin, prev_tx: Some(prevtx.clone()), prev_output };
+				let single_input = SingleOwnedInput { input: txin, prev_tx: None, prev_output };
 				(prev_outpoint, InputOwned::Single(single_input))
 			} else {
 				return Err(AbortReason::PrevTxOutInvalid);