Game.getBlock: Assignment to parameter in arguments object

[deathcap]

The profiler in Chrome 34.0.1847.131 reports this function:

Game.prototype.getBlock = function(pos) {
  pos = this.parseVectorArguments(arguments)
  return this.voxels.voxelAtPosition(pos)
}

is not optimizable because: "Assignment to parameter in arguments object"

[fritx]

bad