Fix for result of static analysis.

Fix for result of static analysis.

In this patch, incorrect coding rule is fixed and resolved warning of static analysis.
1. Uninitialized variables is fixed with initialized.
2. Invalid bracket location is fixed.
3. Incorrect division with zero is prevented.
4. Incorrect referenced pointer is prevented.

Change-Id: I715d671241f3d48a1174c49cbe34074b31a50f02
Signed-off-by: KIM JungYong <jyong2.kim@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/14947
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Uze Choi <uzchoi@samsung.com>