Clarified exception warning

examples/js/loaders/FBXLoader.js

@@ -4329,7 +4329,7 @@
 
 					if ( window.Zlib === undefined ) {
 
-						throw new Error( 'FBXLoader: Import inflate.min.js from https://github.com/imaya/zlib.js' );
+					  throw new Error('FBXLoader: External library Inflate.min.js required, obtain or import from https://github.com/imaya/zlib.js');
 
 					}