fix possible overflow in effect wrappers. am: 9e29523b95 am: baebc739b0 am: 3a9d4f4a83 am: 5b7c20dd1e am: df81fc3f3c am: 68e43cf141 am: b1338d3cfc
am: 440c9e9b72

* commit '440c9e9b72277d6fc6cea630b9ab50f12687a9c0':
  fix possible overflow in effect wrappers.