add an accidentally-dropped normalize from the bf541483d907 / normpacking-rejig

(transplanted from 9e23eb15550830b5efe1012c8169339931ec5f32)

indra/newview/app_settings/shaders/class1/deferred/multiPointLightF.glsl

@@ -55,6 +55,7 @@ void main()
 	
 	vec3 norm = texture2DRect(normalMap, frag.xy).xyz;
 	norm = vec3((norm.xy-0.5)*2.0,norm.z); // unpack norm
+	norm = normalize(norm);
 	vec4 spec = texture2DRect(specularRect, frag.xy);
 	vec3 diff = texture2DRect(diffuseRect, frag.xy).rgb;
 	float noise = texture2D(noiseMap, frag.xy/128.0).b;