Collider for transform.position?


I have a problem. I have added to my simple EnemeyAI a simple movement, here is the script:
var target : Transform; //the enemy’s target
var moveSpeed = 3; //move speed
var rotationSpeed = 3; //speed of turning

var myTransform : Transform; //current transform data of this enemy

function Awake()
    myTransform = transform; //cache transform data for easy access/preformance

function Start()
     target = GameObject.FindWithTag("Player").transform; //target the player


function Update () {
    //rotate to look at the player
    myTransform.rotation = Quaternion.Slerp(myTransform.rotation,
    Quaternion.LookRotation(target.position - myTransform.position), rotationSpeed*Time.deltaTime);

    //move towards the player
    myTransform.position += myTransform.forward * moveSpeed * Time.deltaTime;


But how can I say that my enemy is not walkin through walls anymore?

Simplest way would be to raycast from the enemy to a certain distance in front of it. If something is hit by the raycast, don’t move forward.

if(!Physics.Raycast(transform.position, transform.TransformDirection(Vector3.forward), 1){
    //move forward