Fix gpio input

mopidy_touchscreen/gpio_inpput_manager.py

@@ -48,6 +48,7 @@ def right(channel):
         type = pygame.KEYDOWN
     dict['key'] = pygame.K_RIGHT
     event = pygame.event.Event(type, dict)
+    event.unicode = None
     pygame.event.post(event)
 
 
@@ -59,6 +60,7 @@ def left(channel):
         type = pygame.KEYDOWN
     dict['key'] = pygame.K_RIGHT
     event = pygame.event.Event(type, dict)
+    event.unicode = None
     pygame.event.post(event)
 
 
@@ -70,6 +72,7 @@ def down(channel):
         type = pygame.KEYDOWN
     dict['key'] = pygame.K_DOWN
     event = pygame.event.Event(type, dict)
+    event.unicode = None
     pygame.event.post(event)
 
 
@@ -81,6 +84,7 @@ def up(channel):
         type = pygame.KEYDOWN
     dict['key'] = pygame.K_UP
     event = pygame.event.Event(type, dict)
+    event.unicode = None
     pygame.event.post(event)
 
 
@@ -92,4 +96,5 @@ def enter(channel):
         type = pygame.KEYDOWN
     dict['key'] = pygame.K_RETURN
     event = pygame.event.Event(type, dict)
+    event.unicode = None
     pygame.event.post(event)