Fixed the `clone()` function for me.polyShape
Fixed the `clone()` function for me.polyShape

the array of points also need to be properly cloned

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