rank_filter.hxx: Made sure carry is true for the first run.
rank_filter.hxx: Made sure carry is true for the first run.

nanshe-org/rank_filter,jakirkham/rank_filter,DudLab/rank_filter,DudLab/rank_filter,nanshe-org/rank_filter,DudLab/rank_filter,jakirkham/rank_filter,nanshe-org/rank_filter,jakirkham/rank_filter