Fix type of rlen
Fix type of rlen

bluebore/bfs,imotai/bfs,yvxiang/coverage_for_bfs,lylei/dfs,yvxiang/coverage_for_bfs,yvxiang/dfs,bluebore/bfs,yvxiang/coverage_for_bfs,myawan/bfs-1,baidu/bfs,bluebore/bfs,yvxiang/dfs,myawan/bfs-1,imotai/bfs,bluebore/dfs,baidu/bfs,linyvxiang/dfs,baidu/bfs,bluebore/dfs,lylei/dfs,myawan/bfs-1,myawan/bfs-1,yvxiang/coverage_for_bfs,00k/ToyDFS,baidu/bfs,lylei/dfs,lylei/dfs,linyvxiang/dfs,yvxiang/dfs,bluebore/dfs,linyvxiang/dfs,00k/ToyDFS,imotai/bfs,yvxiang/dfs