From 84f6abf338bd8de87559fa9208eb9076869994d2 Mon Sep 17 00:00:00 2001
From: robertl <robertl@f51c46e8-681c-474f-0cfe-069cfd0219fb>
Date: Sun, 8 Feb 2004 03:38:50 +0000
Subject: [PATCH] Zero alt if unknown.  COrrects problem in Topo 3.0 that isn't
 seen in 4.20d or DR.

---
 gpsbabel/mapsend.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gpsbabel/mapsend.c b/gpsbabel/mapsend.c
index d4f7d6e60..1feecd5e8 100644
--- a/gpsbabel/mapsend.c
+++ b/gpsbabel/mapsend.c
@@ -360,6 +360,8 @@ mapsend_waypt_pr(const waypoint *waypointp)
 	fwrite(&c, 1, 1, mapsend_file_out);
 
 	falt = waypointp->altitude;
+	if (falt == unknown_alt)
+		falt = 0;
 	my_fwrite8(&falt, mapsend_file_out);
 
 	flong = waypointp->longitude;
-- 
2.30.2