fix bug in saturation
This is one character change which correctly identifies source code for the LAr position data. This is needed to match the saturation bits to the correct field for the saturation bits.
It is expected that this will improve matches in comparing hardware and the Athena firmware simulation.
Saturated bits are especially likely in the L1Calo stream which has high energy jets in it.
Since this affects the gTowers to study saturation on the AOD it may be necessary to reprocess from Raw.