fixed sorting bug in tree consolidation code
fixed sorting bug in tree consolidation code

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