fix warning
fix warning

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