Don't crash in navilink on waypoint with no icon description.

diff --git a/navilink.c b/navilink.c
index 9198c36fc1492f0494980782ff65d58a3a530f43..e828983cd6ed31399528a1ab7123cf019a0ef42b 100644 (file)
--- a/navilink.c
+++ b/navilink.c
@@ -166,7 +166,7 @@ find_icon_from_descr(const char *descr)
 {
        int i;
 
-       for (i = 0; i < sizeof(icon_table) / sizeof(const char *); i++) {
+       for (i = 0; descr && i < sizeof(icon_table) / sizeof(const char *); i++) {
                if (strcmp(descr, icon_table[i]) == 0)
                        return i;
        }