GLTFLoader: Minor clean up

examples/js/loaders/GLTFLoader.js

@@ -2225,7 +2225,6 @@ THREE.GLTFLoader = ( function () {
 		] ).then( function ( dependencies ) {
 
 			var primitives = meshDef.primitives;
-			var meshes = [];
 			var originalMaterials = [];
 
 			for ( var i = 0, il = primitives.length; i < il; i ++ ) {
@@ -2240,6 +2239,8 @@ THREE.GLTFLoader = ( function () {
 
 				var isMultiMaterial = geometries.length === 1 && geometries[ 0 ].groups.length > 0;
 
+				var meshes = [];
+
 				for ( var i = 0, il = geometries.length; i < il; i ++ ) {
 
 					var geometry = geometries[ i ];