fixed object reference not set when shim entry would not have exports defined
fixed object reference not set when shim entry would not have exports defined

rangp/RequireJSDotNet,vtfuture/RequireJSDotNet,vtfuture/RequireJSDotNet,vtfuture/RequireJSDotNet,davidsk/RequireJSDotNet,davidsk/RequireJSDotNet,rangp/RequireJSDotNet,davidsk/RequireJSDotNet,rangp/RequireJSDotNet