Move empty stub creation to avoid unnecessary stub.create
Move empty stub creation to avoid unnecessary stub.create

fatso83/Sinon.JS,fatso83/Sinon.JS,mroderick/Sinon.JS,mroderick/Sinon.JS,cjohansen/Sinon.JS,cjohansen/Sinon.JS,mroderick/Sinon.JS,fatso83/Sinon.JS,cjohansen/Sinon.JS