[DTV00922031] misc: Fix NULL pointer risk reported by static analysis tool

[Description]
Fix the NULL pointer access risk reported by the static analysis tool.

Change-Id: Id336b0ff6d94e7b28ba32deae6206db113e3be95
Signed-off-by: Sarick Jiang <sarick.jiang@mediatek.com>
CR-Id: DTV00922031
Feature: misc
Reviewed-on: http://gerrit.mediatek.inc:8080/1273252
CheckPatch: Check Patch <srv_checkpatch@mediatek.com>
Reviewed-by: George Kuo <george.kuo@mediatek.com>
Reviewed-by: Soul Huang <soul.huang@mediatek.com>
Build: srv_neptune_adm <srv_neptune_adm@mediatek.com>
6 files changed