one more check for empty values before plotting on vdiagram AQCU-859
one more check for empty values before plotting on vdiagram AQCU-859

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