[TLOZ] Fix start weapon locations (ArchipelagoMW#1802)

* Fix starting weapon locations usage

Makes a fresh copy of starting weapon locations when get_pool_core is ran
Should fix the issue of dangerous_weapon_locations getting appended to the list for other worlds past the first world that has dangerous StartingPosition, as well as running into the error if ExpandedPool was different between players
Credit for fix goes to @Silvris in the AP Discord

worlds/tloz/ItemPool.py

@@ -92,16 +92,17 @@ def get_pool_core(world):
         placed_items[location] = item
 
     # Starting Weapon
+    start_weapon_locations = starting_weapon_locations.copy()
     starting_weapon = random.choice(starting_weapons)
     if world.multiworld.StartingPosition[world.player] == StartingPosition.option_safe:
-        placed_items[starting_weapon_locations[0]] = starting_weapon
+        placed_items[start_weapon_locations[0]] = starting_weapon
     elif world.multiworld.StartingPosition[world.player] in \
             [StartingPosition.option_unsafe, StartingPosition.option_dangerous]:
         if world.multiworld.StartingPosition[world.player] == StartingPosition.option_dangerous:
             for location in dangerous_weapon_locations:
                 if world.multiworld.ExpandedPool[world.player] or "Drop" not in location:
-                    starting_weapon_locations.append(location)
-        placed_items[random.choice(starting_weapon_locations)] = starting_weapon
+                    start_weapon_locations.append(location)
+        placed_items[random.choice(start_weapon_locations)] = starting_weapon
     else:
         pool.append(starting_weapon)
     for other_weapons in starting_weapons: