fix display

src/controller.py

@@ -12,7 +12,7 @@ __TOPIC_TEXT__ = ""
 
 class Controller:
     connected = False
-	self.display = None
+    display = None
 
     def __init__(self, base_topic, mqtt_host, mqtt_port = 1883):
 
@@ -87,7 +87,7 @@ class Controller:
       while run:
           self.mqtt.loop()
 
-		  if self.display is not None:
+          if self.display is not None:
             self.display.print(self.text[self.poscount])
             self.poscount += 1
             self.poscount %= len(self.text)