handle case where 0 db snapshots exist
handle case where 0 db snapshots exist

macarthur-lab/xbrowse,ssadedin/seqr,macarthur-lab/seqr,macarthur-lab/xbrowse,macarthur-lab/seqr,macarthur-lab/xbrowse,macarthur-lab/seqr,ssadedin/seqr,ssadedin/seqr,macarthur-lab/seqr,macarthur-lab/xbrowse,macarthur-lab/xbrowse,macarthur-lab/seqr,macarthur-lab/xbrowse,ssadedin/seqr,ssadedin/seqr