fixing possible nil pointer dereference (#78)
fixing possible nil pointer dereference (#78)


chaehni/scion-coord,mlegner/scion-coord,mlegner/scion-coord,netsec-ethz/scion-coord,netsec-ethz/scion-coord,mlegner/scion-coord,chaehni/scion-coord,chaehni/scion-coord,netsec-ethz/scion-coord,chaehni/scion-coord,mlegner/scion-coord,netsec-ethz/scion-coord,chaehni/scion-coord,mlegner/scion-coord,chaehni/scion-coord,netsec-ethz/scion-coord,mlegner/scion-coord,netsec-ethz/scion-coord