altosui: Show only supported telemetry version

Make it clear in the UI which telemetry versions are supported,
providing the combobox only for new firmware which supports all versions.

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/altosui/AltosFlightReader.java b/altosui/AltosFlightReader.java
index 47df375d..3ddf171d 100644
--- a/altosui/AltosFlightReader.java
+++ b/altosui/AltosFlightReader.java
@@ -43,5 +43,7 @@ public class AltosFlightReader {
 
 	void update(AltosState state) throws InterruptedException { }
 
+	boolean supports_telemetry(int telemetry) { return false; }
+
 	File backing_file() { return null; }
 }