FIX: mxx::min_element and mxx::max_element have invalid read error as reported by valgrind.
FIX: mxx::min_element and mxx::max_element have invalid read error as reported by valgrind.

ParBLiSS/kmerind,ParBLiSS/kmerind,ParBLiSS/kmerind,ParBLiSS/kmerind,ParBLiSS/kmerind,ParBLiSS/kmerind