Updated builds.

build/three.js

@@ -11770,7 +11770,7 @@
 
     	this.array = array;
     	this.itemSize = itemSize;
-    	this.count = array.length / itemSize;
+    	this.count = array !== undefined ? array.length / itemSize : 0;
     	this.normalized = normalized === true;
 
     	this.dynamic = false;
@@ -38207,7 +38207,7 @@
 
     	this.array = array;
     	this.stride = stride;
-    	this.count = array.length / stride;
+    	this.count = array !== undefined ? array.length / stride : 0;
 
     	this.dynamic = false;
     	this.updateRange = { offset: 0, count: - 1 };