Fix: when graph modification functions is turned off, don't assign nodes that don't need a shelter
Fix: when graph modification functions is turned off, don't assign nodes that don't need a shelter

sbarakat/graph-partitioning,sbarakat/graph-partitioning,sbarakat/graph-partitioning,sbarakat/graph-partitioning,sbarakat/graph-partitioning,sbarakat/graph-partitioning