class Magick::ImageList

def scene=(n)

Allow scene to be set to nil 
def scene=(n)
    if n.nil?
        Kernel.raise IndexError, "scene number out of bounds" unless @images.length == 0
        @scene = nil
        return @scene
    elsif @images.length == 0
        Kernel.raise IndexError, "scene number out of bounds"
    end
    n = Integer(n)
    if n < 0 || n > length - 1
        Kernel.raise IndexError, "scene number out of bounds"
    end
    @scene = n
    return @scene
end