Small change to logic when calling filter_biotypes().
Small change to logic when calling filter_biotypes().

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