Guard for null
Guard for null

- Issue MatterHackers/MCCentral#2499
Repair expected CloudLibrary behavior

unlimitedbacon/MatterControl,unlimitedbacon/MatterControl,larsbrubaker/MatterControl,mmoening/MatterControl,jlewin/MatterControl,larsbrubaker/MatterControl,jlewin/MatterControl,mmoening/MatterControl,mmoening/MatterControl,unlimitedbacon/MatterControl,unlimitedbacon/MatterControl,larsbrubaker/MatterControl,jlewin/MatterControl,jlewin/MatterControl,larsbrubaker/MatterControl