message: Replace memcpy, again
  It's still causing people build issues, and we can do better anyways.
diff: @@ -39,8 +39,7 @@ DEFINE_INTRINSIC_FUNCTION4(env,store,store,none,i32,keyptr,i32,keylen,i32,valuep
  const auto* obj = db.find<key_value_object,by_scope_key>( boost::make_tuple(scope, keystr) );
  if( obj ) {
  db.modify( *obj, [&]( auto& o ) {
  - o.value.resize( valuelen );
  - memcpy( o.value.data(), value, valuelen );
  + o.value.assign(value, valuelen);
  });
  } else {
  db.create<key_value_object>( [&](auto& o) {
  