fix iterator for older rust versions

Author: arik-so

lightning/src/routing/network_graph.rs

@@ -67,7 +67,7 @@ impl NodeId {
 	pub fn from_pubkey(pubkey: &PublicKey) -> Self {
 		NodeId(pubkey.serialize())
 	}
-	
+
 	/// Get the public key slice from this NodeId
 	pub fn as_slice(&self) -> &[u8] {
 		&self.0
@@ -1127,8 +1127,8 @@ impl NetworkGraph {
 	}
 
 	fn add_channel_between_nodes(mut nodes: RwLockWriteGuard<BTreeMap<NodeId, NodeInfo>>, node_id_a: NodeId, node_id_b: NodeId, short_channel_id: u64) -> Result<(), LightningError> {
-		for current_node_id in [node_id_a, node_id_b] {
-			match nodes.entry(current_node_id) {
+		for current_node_id in [node_id_a, node_id_b].iter() {
+			match nodes.entry(current_node_id.clone()) {
 				BtreeEntry::Occupied(node_entry) => {
 					node_entry.into_mut().channels.push(short_channel_id);
 				},
@@ -1547,7 +1547,7 @@ mod tests {
 	use ln::features::{ChannelFeatures, InitFeatures, NodeFeatures};
 	use routing::network_graph::{NetGraphMsgHandler, NetworkGraph, NetworkUpdate, MAX_EXCESS_BYTES_FOR_RELAY};
 	use ln::msgs::{Init, OptionalField, RoutingMessageHandler, UnsignedNodeAnnouncement, NodeAnnouncement,
-		UnsignedChannelAnnouncement, ChannelAnnouncement, UnsignedChannelUpdate, ChannelUpdate, 
+		UnsignedChannelAnnouncement, ChannelAnnouncement, UnsignedChannelUpdate, ChannelUpdate,
 		ReplyChannelRange, ReplyShortChannelIdsEnd, QueryChannelRange, QueryShortChannelIds, MAX_VALUE_MSAT};
 	use util::test_utils;
 	use util::logger::Logger;