Creates a JsonParseError with the right message and location

Property definitions

json $ JSONStringParser :: make_parse_error
	# Creates a `JsonParseError` with the right message and location
	protected fun make_parse_error(message: String): JsonParseError do
		var err = new JsonParseError(message)
		err.location = hot_location
		return err
	end
lib/json/static.nit:271,2--276,4