fix: inconsistent return statements

Author: itkovian

lib/vsc/utils/missing.py

@@ -318,6 +318,8 @@ def new_function(*args, **kwargs):
                         logging.warning("try_or_fail is sleeping for %d seconds before the next attempt", self.sleep)
                         time.sleep(self.sleep)
 
+                return None
+
         return new_function