Merge "Fix potential NULL dereference in Visualizer effect" into klp-dev am: eee86b009e am: 6732f45ee9 am: 24566f2939 am: 25a681e678 am: 73895e0b02 am: c4605f157b am: 78188fec0f am: 24aff93b38
am: 7dc6f5d90b

Change-Id: Ie889159e07f901d8e065e73ca8de6801c75f2820