From 6529fd623f0e4b921aea1110c723d7dc03954def Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Tue, 18 Jun 2019 14:50:18 -0700
Subject: altosui/telegps: Display error message when attempting to graph
 unknown files

Instead of presenting an empty graph window.

Signed-off-by: Keith Packard <keithp@keithp.com>
---
 altoslib/AltosRecordSet.java | 1 +
 1 file changed, 1 insertion(+)

(limited to 'altoslib/AltosRecordSet.java')

diff --git a/altoslib/AltosRecordSet.java b/altoslib/AltosRecordSet.java
index a84cc3f9..4c459cba 100644
--- a/altoslib/AltosRecordSet.java
+++ b/altoslib/AltosRecordSet.java
@@ -19,4 +19,5 @@ import java.util.*;
 public interface AltosRecordSet {
 	public AltosCalData cal_data();
 	public void capture_series(AltosDataListener listener);
+	public boolean valid();
 }
-- 
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