bug fix

Author: fit-alessandro-berti

pm4py/algo/evaluation/precision/variants/align_etconformance.py

@@ -352,7 +352,7 @@ def _compute(idx, trace, results):
 def __align_log_with_multiprocessing_stop_marking(
     fake_log, net, marking, final_marking, progress, parameters=None
 ):
-    if parameters is not None:
+    if parameters is None:
         parameters = {}
 
     import multiprocessing