fix

src/log.c

@@ -120,7 +120,7 @@ int log_add_fp(FILE *fp, int level) {
 static void init_event(log_Event *ev, void *udata) {
     if (!ev->time) {
         time_t t = time(NULL);
-        ev->time = localtime(&t, &ev->time_buf);
+        ev->time = localtime_r(&t, &ev->time_buf);
     }
     ev->udata = udata;
 }