fixup! invoice: swap RouteHop for RouteHint

Author: valentinewallace

lightning-invoice/src/ser.rs

@@ -371,7 +371,11 @@ impl ToBase32 for RouteHint {
 
 		for hop in self.iter() {
 			converter.append(&hop.src_node_id.serialize()[..])?;
-			converter.append(&hop.short_channel_id.to_be_bytes())?;
+			let short_channel_id = try_stretch(
+				encode_int_be_base256(hop.short_channel_id),
+				8
+			).expect("sizeof(u64) == 8");
+			converter.append(&short_channel_id)?;
 
 			let fee_base_msat = try_stretch(
 				encode_int_be_base256(hop.fees.base_msat),