[#668] Fix me.ObservableVector2d callback arguments
[#668] Fix me.ObservableVector2d callback arguments

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