Large integers do not work #157

The following piece of code surprisingly outputs class java.lang.String, instead of a number-class like BigDecimal or BigInteger.

import org.json.JSONException;
import org.json.JSONObject;


public class CodeTest {

    public static void main(String[] args) throws JSONException {
        String str = "{\"number_value\":9223372036854776000}";
        JSONObject x = new JSONObject(str);
        System.out.println(x.get("number_value").getClass());
    }
}

Since JSON does not limit the size of numbers (to the best of my knowledge) I consider this to be a bug.
The culprit is JSONObject.stringToValue which will not work with numbers beyond the range of Java Long.