UnmappedObjectAdaptor is a BaseFeatureAdaptor, but unmapped objects has

no seq_region, so exclude from hack in generic_fetch().

modules/Bio/EnsEMBL/DBSQL/BaseAdaptor.pm

@@ -350,7 +350,9 @@ sub generic_fetch {
 
   # Hack for feature types that needs to be restricted to species_id (in
   # coord_system).
-  if ( $self->isa('Bio::EnsEMBL::DBSQL::BaseFeatureAdaptor') ) {
+  if ( $self->isa('Bio::EnsEMBL::DBSQL::BaseFeatureAdaptor')
+       && !$self->isa('Bio::EnsEMBL::DBSQL::UnmappedObjectAdaptor') )
+  {
     push @tabs, [ 'seq_region', 'sr' ], [ 'coord_system', 'cs' ];
 
     $extra_default_where = sprintf(