f use existing setting if smaller than calculated max path len

Author: valentinewallace

lightning/src/ln/onion_utils.rs

@@ -379,7 +379,10 @@ pub(crate) fn set_max_path_length(
 		.ok_or(())?;
 
 	route_params.payment_params.max_path_length =
-		core::cmp::min(max_path_length, MAX_PATH_LENGTH_ESTIMATE);
+		[max_path_length, route_params.payment_params.max_path_length, MAX_PATH_LENGTH_ESTIMATE]
+			.into_iter()
+			.min()
+			.unwrap();
 	Ok(())
 }