fix crossOrigin propagation in OBJMTL loader

examples/js/loaders/MTLLoader.js

@@ -87,6 +87,7 @@ THREE.MTLLoader.prototype = {
 		}
 
 		var materialCreator = new THREE.MTLLoader.MaterialCreator( this.baseUrl, this.options );
+		materialCreator.crossOrigin	= this.crossOrigin
 		materialCreator.setMaterials( materialsInfo );
 		return materialCreator;
 

examples/js/loaders/OBJMTLLoader.js

@@ -20,6 +20,7 @@ THREE.OBJMTLLoader.prototype = {
 		var scope = this;
 
 		var mtlLoader = new THREE.MTLLoader( url.substr( 0, url.lastIndexOf( "/" ) + 1 ) );
+		mtlLoader.crossOrigin	= scope.crossOrigin;
 		mtlLoader.load( mtlurl, function ( materials ) {
 
 			var materialsCreator = materials;