Script Compiler error?

Compiler error when i build for IOS runs fine in editor. and it is this script that is causing the error.

 using UnityEngine;
 using System.Collections;
 [RequireComponent (typeof(AudioSource))]
 public class splashpager : MonoBehaviour {
 public MovieTexture movie;
 
     void OnGUI()
     {
         GUI.DrawTexture(new Rect(0, 0, Screen.width, Screen.height), movie);
     }
     void Start () 
     {
     audio.clip = movie.audioClip;
     audio.Play();
     movie.Play();
     }
 }