Espruino \0 in object keys

[gfwilliams]

Something is very wrong here and I'm surprised it hasn't been hit before:

>a = { "" : {} }
={ 
  "": {  }
 }
>a["\x00abc"] = "foo"
="foo"
>a[" \x00abc"] = "bar"
="bar"
={ 
  "": "foo", 
  " \0abc": "bar"
 }
>
>a
={ 
  "": "foo", 
  " \0abc": "bar"
 }

I believe the search for object keys is being done with zero-terminated strings, which is causing all kinds of issues.