In this case just draw the frame without starting the timer thread of 
setting a timer and without sending any notifications.

rpcrt4: Move the setting of retval_ptr outside of any particular stub phase in stub_do_args and stub_do_old_args.

After the change in order of phases it was no longer being set in the 
last phase and so caused all stubless functions to appear to have no 
return value.

Add tests for this.