A bug in initialize of Map

[satan53x]

rgss3.rb

class RPG::Map
  def initialize(width, height)
  ...
    @battleback_floor_name = ''
    @battleback_wall_name = ''
  ...
  attr_accessor :battleback1_name
  attr_accessor :battleback2_name

The initialized variable names should be the same as below.
Otherwise it will result in an inability to write back, the battleback1_name and battleback2_name will be nil.