fix compile warning on copy ctor of Wasm (#18)
fix compile warning on copy ctor of Wasm (#18)

* fix compile warning on copy ctor of Wasm
envoyproxy/envoy-wasm,istio/envoy,istio/envoy,envoyproxy/envoy-wasm,istio/envoy,istio/envoy,envoyproxy/envoy-wasm,istio/envoy,istio/envoy,istio/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy-wasm,envoyproxy/envoy-wasm,envoyproxy/envoy-wasm