Fix potential NULL dereference in Visualizer effect

Bug: 30229821

Test: fixing CL. Existing unit tests still pass.

Change-Id: I73d3fe413dd7590470c5b3b19569d6a7969c4dd8
1 file changed
tree: d942c81be0e82df6b57334e213204a181df399c7
  1. hal/
  2. legacy/
  3. visualizer/
  4. voice_processing/
  5. Android.mk