fixed done callback

Author: ryan-lowe

multiagent/environment.py

@@ -127,10 +127,11 @@ def _get_obs(self, agent):
  return self.observation_callback(agent, self.world)
 
  # get dones for a particular agent
+ # unused right now -- agents are allowed to go beyond the viewing screen
  def _get_done(self, agent):
  if self.done_callback is None:
  return False
- return self.observation_callback(agent, self.world)
+ return self.done_callback(agent, self.world)
 
  # get reward for a particular agent
  def _get_reward(self, agent):