honor seed=0 by checking if seed is none instead of using or operator (…

…#254)

Co-authored-by: Fernando Yordan <fernando@Fernandos-MacBook-Pro.local>

catanatron_core/catanatron/game.py

@@ -106,7 +106,7 @@ def __init__(
             initialize (bool, optional): Whether to initialize. Defaults to True.
         """
         if initialize:
-            self.seed = seed or random.randrange(sys.maxsize)
+            self.seed = seed if seed is not None else random.randrange(sys.maxsize)
             random.seed(self.seed)
 
             self.id = str(uuid.uuid4())