fix possible overflow in effect wrappers. am: 9e29523b95 am: baebc739b0 am: 3a9d4f4a83 am: 5b7c20dd1e
am: df81fc3f3c

* commit 'df81fc3f3c56048a797232fa49185831f250e57c':
  fix possible overflow in effect wrappers.