Fixed shader bug introduced in previous commit.

src/renderers/WebGLShaders.js

@@ -287,10 +287,10 @@ THREE.ShaderChunk = {
 
 		"vLightWeighting = vec3( 0.0 );",
 
-		"#if MAX_DIR_LIGHTS > 0",
-
 		"transformedNormal = normalize( transformedNormal );",
 
+		"#if MAX_DIR_LIGHTS > 0",
+
 		"for( int i = 0; i < MAX_DIR_LIGHTS; i ++ ) {",
 
 			"vec4 lDirection = viewMatrix * vec4( directionalLightDirection[ i ], 0.0 );",