Different value types of error.ours and error.yours #314

What steps will reproduce the problem?
1. Perform a request with at least level 2 authentication (we need to use 
oauth_timestamp)
2. Make sure you set oauth_timestamp to a very old value to force 
invalid_timestamp error

What is the expected output? What do you see instead?
The response is, as expected, an error JSON (like the one below).
Please notice "ours" value is of *number* type but "yours" value is of *string* 
type.
Is there a reason for them not being both strings or numbers?
For consistency's sake I'd expect them to be of the same type.

{
  "error": {
    "developer_message": "Expired timestamp, yours 1401039467, ours 1401049467 (threshold 300).",
    "difference": 10000,
    "more_info": "http://opencaching.pl/okapi/introduction.html#errors",
    "ours": 1401049467,
    "reason_stack": [
      "invalid_oauth_request",
      "invalid_timestamp"
    ],
    "status": 400,
    "threshold": 300,
    "yours": "1401039467"
  }
}

Which revision of OKAPI are you using?
rev. 1007