fix: setting weapon index also in case weapon already exists in inven…

…tory (#5)

player/weapon_pivot.gd

@@ -63,6 +63,7 @@ func _process(_delta: float) -> void:
 func add_weapon(new_weapon: PackedScene) -> void:
  for weapon_type in _weapons:
  if weapon_type.resource_path == new_weapon.resource_path:
+ _set_weapon_index(_weapons.find(new_weapon))
  return
 
  _weapons.append(new_weapon)