Fixed  a bug with Sprite._update_position()
This method no longer raises an Exception when the sprite is not visible
@@ -463,7 +463,7 @@ class Sprite(event.EventDispatcher):
def _update_position(self):
if not self._visible:
- self._vertex_list.vertex[:] = (0, 0, 0, 0, 0, 0, 0, 0)
+ self._vertex_list.position[:] = (0, 0, 0, 0, 0, 0, 0, 0)
else:
img = self._texture
x1 = -img.anchor_x
