fix the MMDMaterial shader

examples/js/loaders/MMDLoader.js

@@ -3422,6 +3422,7 @@ THREE.ShaderLib[ 'mmd' ] = {
 		THREE.UniformsLib[ "normalmap" ],
 		THREE.UniformsLib[ "displacementmap" ],
 		THREE.UniformsLib[ "fog" ],
+		THREE.UniformsLib[ "ambient" ],
 		THREE.UniformsLib[ "lights" ],
 		THREE.UniformsLib[ "shadowmap" ],
 
@@ -3542,6 +3543,7 @@ THREE.ShaderLib[ 'mmd' ] = {
 		THREE.ShaderChunk[ "envmap_pars_fragment" ],
 		THREE.ShaderChunk[ "fog_pars_fragment" ],
 		THREE.ShaderChunk[ "bsdfs" ],
+		THREE.ShaderChunk[ "ambient_pars" ],
 		THREE.ShaderChunk[ "lights_pars" ],
 		THREE.ShaderChunk[ "lights_phong_pars_fragment" ],
 		THREE.ShaderChunk[ "shadowmap_pars_fragment" ],