tree fd1c1c28de992b9128aece4ce0c9e65fd868d732
parent 0453c5a1e85aa7663fdc4a72dfe80796bf62bcde
author natalie.chen <natalie.chen@mediatek.com> 1535983073 +0800
committer natalie.chen <natalie.chen@mediatek.com> 1535983119 +0800

check for null pointer