Write unknown alts as zero.

diff --git a/garmin.c b/garmin.c
index 26e425f67efd2a078b39c517606ae2c7abef63e0..b2c22b026cc85cfe157996f31666d3c3749e6cfc 100644 (file)
--- a/garmin.c
+++ b/garmin.c
@@ -464,7 +464,9 @@ waypoint_write(void)
                        icon = d103_icon_number_from_symbol(wpt->icon_descr);
                }
                way[i]->smbl = icon;
-               if (wpt->altitude != unknown_alt) {
+               if (wpt->altitude == unknown_alt) {
+                       way[i]->alt = 0;
+               } else {
                        way[i]->alt = wpt->altitude;
                }
                i++;