* Updated round_json_rpc_error2response() to delete the error object.
* Updated round_json_rpc_error2response() to delete the error object.

cybergarage/round-common,cybergarage/round-common,cybergarage/round-common,cybergarage/round,cybergarage/round,cybergarage/round,cybergarage/round-common,cybergarage/round