message: Replace cast by into()
diff: @@ -271,7 +271,7 @@ fn do_secp256k1_verify<A: Api, S: Storage, Q: Querier>(
  let gas_info = GasInfo::with_cost(GAS_COST_VERIFY_SECP256K1_SIGNATURE);
  process_gas_info::<A, S, Q>(env, gas_info)?;
  match result {
  - Ok(b) => Ok(b as u32),
  + Ok(b) => Ok(b.into()),
  Err(err) => Err(err),
  }
  }
  