Plando: fix automatic locations only working for the first world (#2063)

* copy location_names for each iteration

* remove copy, just set the list

Author: Silvris

BaseClasses.py

@@ -487,8 +487,10 @@ def get_placeable_locations(self, state=None, player=None) -> List[Location]:
     def get_unfilled_locations_for_players(self, location_names: List[str], players: Iterable[int]):
         for player in players:
             if not location_names:
-                location_names = [location.name for location in self.get_unfilled_locations(player)]
-            for location_name in location_names:
+                valid_locations = [location.name for location in self.get_unfilled_locations(player)]
+            else:
+                valid_locations = location_names
+            for location_name in valid_locations:
                 location = self._location_cache.get((location_name, player), None)
                 if location is not None and location.item is None:
                     yield location