fix possible overflow in effect wrappers. am: 9e29523b95 am: baebc739b0 am: 3a9d4f4a83 am: 5b7c20dd1e am: df81fc3f3c am: 68e43cf141 am: b1338d3cfc am: 440c9e9b72
am: 9950df2504

* commit '9950df2504daeb1bde86603065ef072155e48ecf':
  fix possible overflow in effect wrappers.