corrected arithmetic error in fetch_all pointed out by vivek
corrected arithmetic error in fetch_all pointed out by vivek

at7/ensembl,willmclaren/ensembl,james-monkeyshines/ensembl,mjg17/ensembl,at7/ensembl,at7/ensembl,james-monkeyshines/ensembl,muffato/ensembl,mjg17/ensembl,at7/ensembl,danstaines/ensembl,mjg17/ensembl,Ensembl/ensembl,danstaines/ensembl,muffato/ensembl,james-monkeyshines/ensembl,Ensembl/ensembl,muffato/ensembl,muffato/ensembl,danstaines/ensembl,mjg17/ensembl,james-monkeyshines/ensembl,willmclaren/ensembl,Ensembl/ensembl,Ensembl/ensembl