use bit in carcontroller

selfdrive/car/mazda/carcontroller.py

@@ -28,7 +28,7 @@ class CarController():
       self.steer_rate_limited = new_steer != apply_steer
 
     if c.enabled:
-      if CS.out.standstill and frame % 5 == 0:
+      if CS.out.cruiseState.standstill and frame % 5 == 0:
         # Mazda Stop and Go requires a RES button (or gas) press if the car stops more than 3 seconds
         # Send Resume button at 20hz if we're engaged at standstill to support full stop and go!
         # TODO: improve the resume trigger logic by looking at actual radar data