FBXLoader: Clean up.

examples/js/loaders/FBXLoader.js

@@ -2493,7 +2493,10 @@ THREE.FBXLoader = ( function () {
 										var rawModel = fbxTree.Objects.Model[ modelID.toString() ];
 
 										if ( rawModel === undefined ) {
+
+											console.warn( 'THREE.FBXLoader: Encountered a unused curve.', child );
 											return;
+
 										}
 
 										var node = {

examples/jsm/loaders/FBXLoader.js

@@ -2540,7 +2540,10 @@ var FBXLoader = ( function () {
 										var rawModel = fbxTree.Objects.Model[ modelID.toString() ];
 
 										if ( rawModel === undefined ) {
+
+											console.warn( 'THREE.FBXLoader: Encountered a unused curve.', child );
 											return;
+
 										}
 
 										var node = {