correctly reset db.sequence count/length for databases that are too large for memory and must be re-read
correctly reset db.sequence count/length for databases that are too large for memory and must be re-read

wrpearson/fasta36,wrpearson/fasta36,wrpearson/fasta36,wrpearson/fasta36,wrpearson/fasta36,wrpearson/fasta36