Changes the state number of the player.

Required parameters:

- value = state_no (int)
  state_no is the number of the state to change to.

Optional parameters:

- ctrl = ctrl_flag (boolean)
  ctrl_flag is the value to set the player's control flag to. Valid values are 0 and 1.
- anim = anim_no (int)
  anim_no is the action number to switch to.

Example:

`; Change to standing state, and give player control
type = ChangeState
value = 0
ctrl = 1`