Hard code the watchdog interval to 3 seconds in case log interval is greatly different.
diff --git a/main.c b/main.c
index 9c3b127..cd26ef1 100644
--- a/main.c
+++ b/main.c
@@ -4696,7 +4696,7 @@ static bool active_device(int thr_id)
* died. */
static void *watchdog_thread(void *userdata)
{
- const unsigned int interval = opt_log_interval / 2 ? : 1;
+ const unsigned int interval = 3;
static struct timeval rotate_tv;
struct timeval zero_tv;