Added missing *NeedUpdate flags to Geometry.

src/core/Geometry.js

@@ -36,6 +36,15 @@ THREE.Geometry = function () {
 
 	this.dynamic = true; // the intermediate typearrays will be deleted when set to false
 
+	// update flags
+
+	this.verticesNeedUpdate = false;
+	this.elementsNeedUpdate = false;
+	this.uvsNeedUpdate = false;
+	this.normalsNeedUpdate = false;
+	this.tangentsNeedUpdate = false;
+	this.colorsNeedUpdate = false;
+
 };
 
 THREE.Geometry.prototype = {