AQCU-772: Fixed a missing null check when no valid data points received.
AQCU-772: Fixed a missing null check when no valid data points received.

USGS-R/repgen,zmoore-usgs/repgen,zmoore-usgs/repgen,USGS-R/repgen,lindsaycarr/repgen,mhines-usgs/repgen,thongsav-usgs/repgen,dpattermann-usgs/repgen,USGS-R/repgen,mhines-usgs/repgen,zmoore-usgs/repgen,lindsaycarr/repgen,thongsav-usgs/repgen,lindsaycarr/repgen,thongsav-usgs/repgen,dpattermann-usgs/repgen,dpattermann-usgs/repgen,mhines-usgs/repgen