Fix bug in multispline routing using ports. The code for finding triangles close to a port edge was incorrect.
Fix bug in multispline routing using ports. The code for finding
triangles close to a port edge was incorrect.

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