argonnite: fix memory leak

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
genomics: examine kmer store

Link: https://github.com/GeneAssembly/biosal/issues/707
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
memory: use size_t for memory block sizes

Link: https://github.com/GeneAssembly/biosal/issues/707
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>