[#668] fixed the `clone` function
[#668] fixed the `clone` function

copy/pasta !!!

TukekeSoft/melonJS,TukekeSoft/melonJS,srbala/melonJS,TukekeSoft/melonJS,rlugojr/melonJS,srbala/melonJS,gopalindians/melonJS,srbala/melonJS,melonjs/melonJS,rlugojr/melonJS,gopalindians/melonJS,gopalindians/melonJS,rlugojr/melonJS,melonjs/melonJS