Fix crash in ADJUST_CHAIR mode, Fix Rest not stopping

While testing the ADJUST_CHAIR mode on actual hardware fixed the
following issues:

- main.cpp: Uninitialized pointer for leg/back-rest were passed to
  control task thus as when a method was called the controller crashed

- chairAdjust.cpp: the state was never reset to REST_OFF when below
  stick threshold

common/chairAdjust.cpp

@@ -48,6 +48,7 @@ void cControlledRest::init()
     // both relays off initially
     gpio_set_level(gpio_down, 0);
     gpio_set_level(gpio_up, 0);
+    state = REST_OFF;
 }
 
 
@@ -105,7 +106,10 @@ void controlChairAdjustment(joystickData_t data, cControlledRest * legRest, cCon
     //leg rest (x-axis)
     if (data.x > stickThreshold) legRest->setState(REST_UP);
     else if (data.x < -stickThreshold) legRest->setState(REST_DOWN);
+    else legRest->setState(REST_OFF);
+
     //back rest (y-axis)
     if (data.y > stickThreshold) backRest->setState(REST_UP);
     else if (data.y < -stickThreshold) backRest->setState(REST_DOWN);
+    else backRest->setState(REST_OFF);
 }

common/chairAdjust.hpp

@@ -17,12 +17,12 @@ extern const char* restStateStr[];
 //class that controls 2 relays powering a motor that moves a rest of the armchair up or down
 //2 instances will be created one for back and one for leg rest
 class cControlledRest {
-    public:
-    cControlledRest(gpio_num_t gpio_up, gpio_num_t gpio_down, const char * name);
+public:
+    cControlledRest(gpio_num_t gpio_up, gpio_num_t gpio_down, const char *name);
     void setState(restState_t targetState);
     void stop();
 
-    private:
+private:
     void init();
 
     char name[32];