bugfix: set_state updated state if not changed

homeassistant/__init__.py

@@ -379,8 +379,6 @@ class StateMachine(object):
 
         attributes = attributes or {}
 
-        state = State(new_state, attributes)
-
         with self.lock:
             # Change state and fire listeners
             try:
@@ -388,7 +386,7 @@ class StateMachine(object):
 
             except KeyError:
                 # If state did not exist yet
-                pass
+                self.states[entity_id] = State(new_state, attributes)
 
             else:
                 if old_state.state != new_state or \