Bug fix - was causing blank xref display_labels
Bug fix - was causing blank xref display_labels

mn1/ensembl-analysis,james-monkeyshines/ensembl-analysis,james-monkeyshines/ensembl-analysis,Ensembl/ensembl-analysis,kiwiroy/ensembl-analysis,mn1/ensembl-analysis,Ensembl/ensembl-analysis,Ensembl/ensembl-analysis,kiwiroy/ensembl-analysis,mn1/ensembl-analysis,james-monkeyshines/ensembl-analysis