OurReader::DecodeNumber leads to bad value type

We are using Jsoncpp 1.9.4 with Viual Studio 2015 in a Win32 configuration.
We just have changed from Json::Reader to Json::CharReaderBuilder.
When parsing the following text { "test":-1} to Json::Value val
the expresstion val["test"].asInt() leads to a

JSON_ASSERT_MESSAGE(..., "LargestUInt out of Int range"),

as the type computed in OurReader::decodeNumber(Token& token, Value& decoded) is UInt.

Expected behavior
I think a parsed value of -1 should lead to a Json::Value of type int.
When I changed the followig code from

OurReader::decodeNumber(Token& token, Value& decoded)
....
if (isNegative)
{
	// We use the same magnitude assumption here, just in case.
	const auto last_digit = static_cast<Value::Int>(value % 10);// changed from Value:Uint to Value::Int
	decoded = -Value::LargestInt(value / 10) * 10 - last_digit;
}

...
the problem is solved.

Desktop (please complete the following information):

• OS: Windows 10

Additional context
Visual Studio 2015 Win32 as target version

Search for OurReader::decodeNumber(Token& token, Value& decoded) and reproduce parsing {"test":-1} with Json::CharReaderBuilder, then check val["test"].asInt(). Add a regression test covering the negative value and confirm the parsed value can be read as an int without the range assertion.