Fix for loop filter selection procedure

Fixed best error reported by loop filter selection, this value is used
during loop restoration to pick best mode. Baseline remains unchanged,
change in BDRate for loop restoration experiment:
-0.628 -> -0.625 for lowres,
-1.262 -> -1.283 for highres.

Change-Id: I69ef1608bc232b250ac46f59e31fdbed1a999dcd