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

* commit 'b1338d3cfcb47d0fc5f21e2b939d66316b307fe3':
  fix possible overflow in effect wrappers.