Method checkAddComma

src/base/JSONSerializer.h:102–107

		private:

			void checkAddComma() {
				const char c = _json.back();
				if (c == '\"' || c == '}' || c == ']' || std::isdigit(c)) {
					_json += ", ";
				}
			}

			std::string makeJSONString(const std::string &msg) {
				std::string json(msg);