making failed commands list more explicit

xtreemfs_client/OSDManager.py

@@ -224,9 +224,7 @@ class OSDManager(object):
 
             for process in processes:
                 # check the return code. if it is one, the replica could not be deleted, so we try again later.
-                if not process[2]:
-                    pass
-                else:
+                if process[2] == 1:
                     errored_deletions.append(process[0])
 
             if len(errored_deletions) == 0: