Fix defects detected by static analysis

Fix defects detected by static analysis

Change-Id: I9f2fd3a24df5f1394174e71ee561ed02ac8d0769
Signed-off-by: Parkhi <h_w.park@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/15133
Reviewed-by: Uze Choi <uzchoi@samsung.com>
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Jihun Ha <jihun.ha@samsung.com>
(cherry picked from commit 94ad6508f77f5904de76e85ee30de43b44d738fc)
Reviewed-on: https://gerrit.iotivity.org/gerrit/15135
Reviewed-by: Hemant Mahsky <h.mahsky@samsung.com>