Better error handling in compare component.
Better error handling in compare component.

Fixes DIM-4H.

delphiactual/DIM,delphiactual/DIM,DestinyItemManager/DIM,DestinyItemManager/DIM,bhollis/DIM,bhollis/DIM,bhollis/DIM,chrisfried/DIM,chrisfried/DIM,chrisfried/DIM,chrisfried/DIM,DestinyItemManager/DIM,delphiactual/DIM,DestinyItemManager/DIM,delphiactual/DIM,bhollis/DIM