message: Fix emscripten table being init'd with externref::null
diff: @@ -475,8 +475,7 @@ impl EmscriptenGlobals {
  minimum: table_min,
  maximum: table_max,
  };
  - // TODO: review init value
  - let table = Table::new(store, table_type, Val::null()).unwrap();
  + let table = Table::new(store, table_type, Val::FuncRef(None)).unwrap();
  let data = {
  let static_bump = STATIC_BUMP;
  