merged in improved null ref handling in ensuresuccess
merged in improved null ref handling in ensuresuccess

davidyack/Xrm.Tools.CRMWebAPI,davidyack/Xrm.Tools.CRMWebAPI,davidyack/Xrm.Tools.CRMWebAPI,davidyack/Xrm.Tools.CRMWebAPI,davidyack/Xrm.Tools.CRMWebAPI