Move debug code in network simplex to rely on graph structure, not shadow graph structure.
Move debug code in network simplex to rely on graph structure, not
shadow graph structure.

ellson/graphviz,tkelman/graphviz,ellson/graphviz,jho1965us/graphviz,jho1965us/graphviz,jho1965us/graphviz,kbrock/graphviz,MjAbuz/graphviz,tkelman/graphviz,ellson/graphviz,jho1965us/graphviz,BMJHayward/graphviz,kbrock/graphviz,jho1965us/graphviz,pixelglow/graphviz,ellson/graphviz,pixelglow/graphviz,jho1965us/graphviz,ellson/graphviz,kbrock/graphviz,MjAbuz/graphviz,pixelglow/graphviz,jho1965us/graphviz,kbrock/graphviz,ellson/graphviz,MjAbuz/graphviz,tkelman/graphviz,MjAbuz/graphviz,pixelglow/graphviz,ellson/graphviz,tkelman/graphviz,kbrock/graphviz,MjAbuz/graphviz,kbrock/graphviz,pixelglow/graphviz,tkelman/graphviz,kbrock/graphviz,BMJHayward/graphviz,ellson/graphviz,jho1965us/graphviz,pixelglow/graphviz,MjAbuz/graphviz,pixelglow/graphviz,MjAbuz/graphviz,BMJHayward/graphviz,tkelman/graphviz,MjAbuz/graphviz,kbrock/graphviz,BMJHayward/graphviz,ellson/graphviz,ellson/graphviz,kbrock/graphviz,tkelman/graphviz,ellson/graphviz,BMJHayward/graphviz,BMJHayward/graphviz,BMJHayward/graphviz,pixelglow/graphviz,kbrock/graphviz,kbrock/graphviz,jho1965us/graphviz,pixelglow/graphviz,tkelman/graphviz,BMJHayward/graphviz,BMJHayward/graphviz,jho1965us/graphviz,BMJHayward/graphviz,MjAbuz/graphviz,BMJHayward/graphviz,pixelglow/graphviz,tkelman/graphviz,tkelman/graphviz,jho1965us/graphviz,tkelman/graphviz,MjAbuz/graphviz,pixelglow/graphviz,MjAbuz/graphviz