altoslib: Don't crash when map flight data is missing

Just a couple of null pointer checks to allow the map display to come
up even when no data are available.

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

1 files changed, 2 insertions, 0 deletions

diff --git a/altoslib/AltosMap.java b/altoslib/AltosMap.java
index 69142c37..8fc40e8a 100644
--- a/altoslib/AltosMap.java
+++ b/altoslib/AltosMap.java
@@ -499,6 +499,8 @@ public class AltosMap implements AltosMapTileListener, AltosMapStoreListener {
 		notice_user_input();
 		if (path == null)
 			return null;
+		if (transform == null)
+			return null;
 		AltosLatLon	at = transform.screen_lat_lon(new  AltosPointInt(x, y));
 		return path.nearest(at);
 	}