Shader on iphone drives camera to portrait

Unity Engine
1

I’m using the Night Vision Shader from the wiki on my iphone, it performs ok, but it drives the camera from landscape to portrait. Here is the script from the wiki:

Shader "Hidden/NightVision" {
Properties {
	_MainTex ("Base (RGB)", 2D) = "white" {}
}

SubShader {
	Pass {
		ZTest Always Cull Off ZWrite Off Lighting Off
		Fog { Mode off }

		CGPROGRAM
			#pragma vertex vert_img
			#pragma fragment frag
			#pragma fragmentoption ARB_precision_hint_fastest 
			#include "UnityCG.cginc"

			uniform sampler2D _MainTex;

			float4 frag (v2f_img i) : COLOR {
				float4 c = tex2D(_MainTex, i.uv);
				c.b = c.r*2;
				c.g = c.b*2;
				return c;
			}
		ENDCG
	}
}
Fallback off
}

How can I make the shader stay in landscape?

Thanks

2

Man, disregard, this shader is too heavy, is there some other shader for a night vision on the iphone?