magnav: Check for a valid creation time.

diff --git a/magnav.c b/magnav.c
index d1e91d3c9f40e7f6116bea7e3002fac6bfbe0817..038cd8919b2e18909d8fe18a450c4dcb22e68b29 100644 (file)
--- a/magnav.c
+++ b/magnav.c
@@ -119,8 +119,8 @@ data_read(void)
                tm.tm_mday = be_read16(&rec->crt_mday);
                tm.tm_mon = be_read16(&rec->crt_mon) - 1;
                tm.tm_year = be_read16(&rec->crt_year) - 1900;
-               wpt_tmp->creation_time = mktime(&tm); 
-
+               if (mkgmtime(&tm) > 0)
+                       wpt_tmp->creation_time = mktime(&tm); 
                waypt_add(wpt_tmp);
 
        }