fixed dobfs inconsistenct results. Due to new invalid node ID util::Maxvalue(VertexId)-1
fixed dobfs inconsistenct results. Due to new invalid node ID util::Maxvalue(VertexId)-1

anshumang/gunrock-swched-swmm,Damien-/gunrock,ydwu/gunrock,Damien-/gunrock,ydwu/gunrock,ydwu/gunrock,anshumang/gunrock-swched-swmm,anshumang/gunrock-swched-swmm,Damien-/gunrock,Damien-/gunrock,Damien-/gunrock,anshumang/gunrock-swched-swmm,ydwu/gunrock,ydwu/gunrock,anshumang/gunrock-swched-swmm