fix Include vout check as well in OutPoint check for shared input

Author: optout21

lightning/src/ln/interactivetxs.rs

@@ -638,7 +638,9 @@ impl NegotiationContext {
 					return Err(AbortReason::DuplicateFundingInput);
 				}
 				// Check if received shared input matches the expected
-				if shared_funding_input.0.txid != *shared_txid {
+				if !(shared_funding_input.0.txid == *shared_txid
+					&& shared_funding_input.0.vout == msg.prevtx_out)
+				{
 					return Err(AbortReason::UnexpectedFundingInput);
 				} else {
 					let previous_output = OutPoint { txid: *shared_txid, vout: msg.prevtx_out };