message: Fix vm compile issue
diff: @@ -565,7 +565,7 @@ mod tests {
  // set up an instance that will experience an error in an import
  let error_message = "Api failed intentionally";
  let mut instance = mock_instance_with_failing_api(CONTRACT, &[], error_message);
  - let init_result = call_instantiate::<_, _, _, serde_json::Value>(
  + let init_result = call_instantiate::<_, _, _, Empty>(
  &mut instance,
  &mock_env(),
  &mock_info("someone", &[]),
  