uniq: now outputs an empty view if input view is empty instead of

displaying an error

python/obitools3/commands/uniq.pyx

@@ -591,6 +591,7 @@ def run(config):
     # Initialize the progress bar
     pb = ProgressBar(len(entries), config, seconde=5)
     
+    if len(entries) > 0:
         try:
             uniq_sequences(entries, o_view, pb, config, mergedKeys_list=config['uniq']['merge'], taxonomy=taxo, mergeIds=config['uniq']['mergeids'], categories=config['uniq']['categories'], max_elts=config['obi']['maxelts'])       
         except Exception, e: