Fixed memory leak on ocpayload.c

Fixed memory leak on ocpayload.c

Fixed memory leak on ocpayload.c detected by static analysis

Change-Id: I3a8de43b8feff88509af6959f6b78b79eb8feb4c
Signed-off-by: hyuna0213.jo <hyuna0213.jo@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/19937
Reviewed-by: Jaehong Jo <jaehong.jo@samsung.com>
Reviewed-by: Dan Mihai <Daniel.Mihai@microsoft.com>
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Uze Choi <uzchoi@samsung.com>
Reviewed-by: Jaewook Jung <jw0213.jung@samsung.com>
Reviewed-by: Ashok Babu Channa <ashok.channa@samsung.com>