Animat_id assert missing in camera follower extention

[cartacamilla]

farms_mujoco/farms_mujoco/simulation/extensions.py

Line 184 in 547c892

self.links = task.data.animats[self.animat_id].sensors.links

This line breaks if the number of animats is smaller than the animat_id requested for the camera following.
An assert before this line would avoid the break and clarify the error message.

[cartacamilla]

Suggested correction in function initialize_episode :

        assert task.data.animats[self.animat_id] (
            f"CameraFollower {self.animat_id=} not in animats list"
        )