Update automatic.py

Only update the fan if we're armed, not in manual mode (fixes faulty manual button control)

Author: colindomoney

examples/automatic.py

@@ -146,8 +146,8 @@ def held_handler():
             elif t <= args.off_threshold:
                 enable = False
 
-        if set_fan(enable):
-            last_change = t
+            if set_fan(enable):
+                last_change = t
 
         if not args.noled:
             update_led_temperature(t)