fix chunk copy error in node 0.2.3+
fix chunk copy error in node 0.2.3+

lucasconstantino/node-static,Slayer95/node-static,winkapp/node-static,brodybits/node-static,janmonschke/node-static,edpaget/node-static,cloudhead/node-static,hayksaakian/static_striationnutrition,hayashi311/node-static