Update genomeSAindexNbases calculations to handle small genomes
Update genomeSAindexNbases calculations to handle small genomes

chapmanb/cloudbiolinux,rchekaluk/cloudbiolinux,joemphilips/cloudbiolinux,chapmanb/cloudbiolinux,rchekaluk/cloudbiolinux,rchekaluk/cloudbiolinux,joemphilips/cloudbiolinux,joemphilips/cloudbiolinux,rchekaluk/cloudbiolinux,chapmanb/cloudbiolinux,chapmanb/cloudbiolinux,joemphilips/cloudbiolinux