Fix bug (#9641)

examples/webgl_morphtargets.html

@@ -110,7 +110,7 @@
 
 				// construct 8 blend shapes
 
-				for ( var i = 0; i < geometry.vertices.length; i ++ ) {
+				for ( var i = 0; i < 8; i ++ ) {
 
 					var vertices = [];