Fix defect detected by static code analyzer

Fix defect detected by static code analyzer

 - Changed return value because function declared void returns a non-void value.

Change-Id: I154e572292d95905ddd222b049cde7e870bd67f8
Signed-off-by: Parkhi <h_w.park@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/18305
Reviewed-by: Jihun Ha <jihun.ha@samsung.com>
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Phil Coval <philippe.coval@osg.samsung.com>
Reviewed-by: Uze Choi <uzchoi@samsung.com>
Tested-by: Uze Choi <uzchoi@samsung.com>