Merge pull request #1077 from fls-bioinformatics-core/add_command-set-retval-for-None

'add_command' decorator handle 'None' from wrapped command function

Author: pjbriggs

auto_process_ngs/decorators.py

@@ -85,6 +85,9 @@ def wrapped_func(*args,**kws):
             ret = 1
         else:
             print("[%s] %s: finished" % (timestamp(),name))
+        if ret is None:
+            # Assume success
+            ret = 0
         return ret
     def timestamp():
         # Return the current time