fix cut and paste into macro editor crash

e.g. select all in macro editor in virtualbox and paste
into Linux macro editor and explode in debugging iterator
land.

regression due to IA2 integration of
efb23f29983f87104a684e7fab00b84fc59d131d

Change-Id: Ic7a4e9f5455f4ba3eaf0afd38fd5e445d6dc28e6