kitchen_pilot_wire: activate 3rd watchdog

soft/kitchen/kitchen_pilot_wire_control/kitchen_pilot_wire_control.ino

@@ -116,6 +116,8 @@ void setup()
 
   heaters[KITCHEN].callback = kitchen_callback;
 
+  lwdTicker.attach_ms(LWD_TIMEOUT_MS / 2, lwdtcb);
+
   for (i = 0; i < NB_HEATERS; i++) {
     pinMode(heaters[i].pin, OUTPUT);
     heater_off(heaters[i].pin);
@@ -146,6 +148,8 @@ void loop()
   static unsigned int counter;
   static bool led_state = false;
 
+  lwdtFeed();
+
   client.loop();
   if (!client.isConnected()) {
     // if something wrong happens, switch off the heater
@@ -160,5 +164,4 @@ void loop()
     led_on(led_state);
   }
   counter++;
-  lwdtFeed();
 }