fixed a null pointer error in NeighborsQuestion
fixed a null pointer error in NeighborsQuestion

intentionet/batfish,dhalperi/batfish,intentionet/batfish,batfish/batfish,intentionet/batfish,dhalperi/batfish,dhalperi/batfish,intentionet/batfish,batfish/batfish,arifogel/batfish,batfish/batfish,arifogel/batfish,intentionet/batfish,arifogel/batfish