Fix bad postdecrement of NodeSet iterator
Fix bad postdecrement of NodeSet iterator

pixelglow/graphviz,ellson/graphviz,ellson/graphviz,pixelglow/graphviz,jho1965us/graphviz,ellson/graphviz,pixelglow/graphviz,jho1965us/graphviz,ellson/graphviz,ellson/graphviz,pixelglow/graphviz,ellson/graphviz,ellson/graphviz,jho1965us/graphviz,pixelglow/graphviz,jho1965us/graphviz,pixelglow/graphviz,ellson/graphviz,jho1965us/graphviz,pixelglow/graphviz,pixelglow/graphviz,pixelglow/graphviz,ellson/graphviz,jho1965us/graphviz,pixelglow/graphviz,jho1965us/graphviz,ellson/graphviz,jho1965us/graphviz,ellson/graphviz,jho1965us/graphviz,jho1965us/graphviz,pixelglow/graphviz,jho1965us/graphviz